Calculous chronic prostatitis: symptoms and treatment

Calculous chronic prostatitis is a long-term inflammation of the prostate gland in men, in which stones form in the prostate tissue. These stones serve as a "safe haven" for microbes and biofilms, sustain inflammation, interfere with the drainage of secretions, and are often associated with recurrent urinary tract infections and chronic pelvic pain. Understanding the role of stones is essential: without taking them into account, some patients are treated "in a cycle," receiving courses of antibacterial drugs with temporary effects. [1]

Today, doctors have more precise diagnostic algorithms and multi-level treatment regimens: from targeted antibacterial and anti-inflammatory strategies to pelvic floor muscle physiotherapy and, if necessary, endoscopic removal of stones along with obstructing prostate tissue. This combination increases the chances of sustained symptom control and reduces the frequency of exacerbations. [2]

It is important to distinguish calculous chronic prostatitis from chronic prostatitis without stones and from chronic pelvic pain syndrome without proven infection. Prostate stones do not always cause symptoms, but in chronic inflammation and pain, they are a significant factor. [3]

Finally, new data on biofilms explains why some patients respond poorly to standard antibiotic treatments: microorganisms "mask" themselves in the micro-niches of stones and in the gland's tubules, forming stable communities where medications have poor penetration. This influences the choice of medications, the duration of therapy, and the indications for interventions. [4]

Code according to ICD-10 and ICD-11

In the International Classification of Diseases, Tenth Revision, calculous chronic prostatitis is coded using two categories: chronic inflammation of the prostate gland (N41.1) and prostate calculus (N42.0). The combination of these codes reflects both the inflammatory component and the presence of calculi. This dual approach is important for accurate reporting and treatment planning. [5]

The International Classification of Diseases, Eleventh Revision, uses the codes GA91.0 "Chronic Prostatitis" and GA91.3 "Prostatic Stone" for the same clinical situation. In some cases, it is appropriate to indicate concomitant conditions, such as prostatic hyperplasia, if it affects the outflow of secretions and urine. This helps to plan the patient's treatment plan and select the appropriate treatment options. [6]

Table 1. Codes for calculous chronic prostatitis

Classification	Inflammation of the prostate	Prostate stone	Comments
ICD-10	N41.1 "Chronic prostatitis"	N42.0 "Prostate Stone"	You can specify both codes at the same time.
ICD-11	GA91.0 "Chronic prostatitis"	GA91.3 "Prostate Stone"	In section GA91 "Prostate diseases"
Source: official reference books ICD-10 and ICD-11. [7]

Epidemiology

Symptoms of chronic prostatitis and chronic pelvic pain syndrome occur in 5-16% of men in the population, according to various studies and surveys. This is one of the leading reasons for working-age men to consult a urologist. Prevalence is highest in the 35-50 age range, but complaints are reported by both young and older patients. [8]

Prostate stones are frequently detected and become more common with age: according to ultrasound and computed tomography studies, the incidence increases from approximately 7-10% in young men to 60-70% in older men. In screening cohorts, the finding is often incidental, but in some patients it is associated with lower urinary tract symptoms and chronic pain. [9]

In groups with prostate hyperplasia, the proportion of stones is particularly high and can exceed 60-70%, and in chronic inflammation, the association with pain and sexual dysfunction is more pronounced. This is confirmed by observational and review studies in recent years. [10]

The disease places a significant economic burden on the healthcare system, requiring multiple visits, lengthy courses of medication, examinations, and, for some patients, surgical interventions. Stone monitoring and proper patient stratification can reduce repeat hospitalizations and unnecessary courses of antibiotics. [11]

Reasons

The primary mechanism for stone formation is the deposition of calcium phosphates, primarily hydroxyapatite, on "nuclei" of amylacea corpora and cellular debris within the gland's ducts. Such nuclei arise from secretory stagnation, inflammation, and microbial activity. This occurs more frequently with age, especially when drainage is impaired. [12]

Another pathway is urine reflux into the prostate ducts, resulting in the crystallization of salts normally absent from prostatic secretions. This is why stones often contain components typical of urine and are located closer to the urethra. This phenomenon is called intraprostatic reflux. [13]

The presence of stones facilitates the formation of microbial biofilms: microorganisms adhere to the rough surface and become less sensitive to medications and standard concentrations of antibiotics. Biofilms maintain chronic inflammation and explain resistant relapses. [14]

Finally, prostatic hyperplasia, which mechanically impairs the outflow of secretions and predisposes to stagnation, as well as previous urinary tract infections and manipulations on the urethra, which change local biomechanics and microbiota, contribute. [15]

Table 2. What is the basis for stone formation in the prostate?

Factor	How it works	What does this give in the clinic?
Hydroxyapatite deposits	Crystallization on "cores" of Corpora amylacea	"Solid matrix" for biofilms
Intraprostatic reflux	The entry of urinary salts into the gland ducts	Stones closer to the urethra, inflammation
Biofilms	Decreased sensitivity to therapy	Relapses, protracted course
Prostate hyperplasia	Stagnation of secretion, obstruction	Increased risk of stones and symptoms
Sources: pathomorphology of stones, clinical and ultrasound reviews. [16]

Risk factors

Age remains the most powerful factor: the incidence of stones and chronic inflammation increases with age. Prostate size and the severity of lower urinary tract symptoms associated with hyperplasia also play a role. [17]

Risk factors include previous urinary tract infections, epididymitis, unprotected anal intercourse, lower urinary tract manipulation, and phimosis. These conditions may promote microbial colonization and urinary reflux into the prostate ducts. [18]

Metabolic comorbidities such as diabetes mellitus and hypertension are associated with prostate calcifications in population-based studies, although the causal relationship remains debated. Management of these conditions improves the overall prognosis and the course of urological symptoms. [19]

Physical inactivity and prolonged sitting increase pelvic pain and pelvic floor muscle dysfunction, which exacerbates symptoms regardless of the microbial factor. In some men, the contribution of muscle tone disorders is comparable to that of inflammation. [20]

Pathogenesis

Stones and biofilms form a vicious cycle: secretion stagnation and reflux → formation of corpora amylacea → crystallization of hydroxyapatite → microbial attachment to the biofilm → chronic inflammation and pain → further stagnation. Breaking this cycle is difficult without a comprehensive approach. [21]

The inflammation occurs in foci, involving ducts and stromal structures. In some patients, neuroimmune pain mechanisms and central sensitization predominate, meaning the severity of the pain component does not always correlate strictly with bacterial findings. This explains why "antibiotic logic" alone cannot solve the problem. [22]

In prostatic hyperplasia, mechanical obstruction and turbulence of urine flow "push" reflux into the prostatic ducts. Therefore, in patients with severe hyperplasia, stones and inflammation are more common, and interventions that relieve obstruction often reduce pain and urinary symptoms. [23]

The composition of the stones influences their behavior: a predominance of hydroxyapatite makes them radiopaque and more visible on ultrasound and CT scans. However, for management, the clinical context is more important than the chemical composition: whether there is recurrent infection, pain, or significant urinary dysfunction. [24]

Symptoms

The main complaints are a nagging or burning pain in the perineum, pubic area, scrotum, at the base of the penis, and in the lower back, as well as discomfort after ejaculation. The pain lasts for more than 3 months, may intensify with sitting, and subside after warm treatments. Many men experience fluctuating symptoms with exacerbations. [25]

Urinary dysfunction includes increased urgency, a feeling of incomplete urination, a weak stream, nocturnal urination, and a burning sensation when urinating. These symptoms overlap with prostatic hyperplasia and cystitis, so proper differentiation of the underlying causes is important. [26]

Sexual dysfunctions include painful ejaculation, decreased libido, and erectile dysfunction. According to meta-analyses, erectile dysfunction occurs in approximately one-third of men with chronic pelvic pain syndrome, requiring sensitive discussion and treatment. [27]

Recurrent bacterial infections typically involve repeated episodes of cystitis with the same strain, often with incomplete response to standard antibiotic treatment. This is a red flag for stones and biofilms as a reservoir of infection. [28]

Table 3. The most common complaints and what they may mean

Symptom	Possible interpretation
Pain in the perineum for more than 3 months	Chronic inflammation and neuroimmune pain
Painful ejaculation	Involvement of the ducts and seminal vesicles
Frequent urination, weak stream	Combination of inflammation and obstruction
Recurrent infections with one strain	Reservoir of bacteria in stones and biofilms
Sources: modern manuals and reviews. [29]

Classification, forms and stages

Clinically, the international classification of the National Institutes of Health is used: chronic bacterial prostatitis, chronic prostatitis or chronic pelvic pain syndrome without proven infection, and asymptomatic inflammation. The calculous variant is most often classified as bacterial, but stones can also accompany nonbacterial forms. [30]

Based on their origin, stones are classified as endogenous (formed in acini due to congestion and inflammation) and exogenous (occurring due to urinary reflux and most often localized near the urethra). This typology helps to identify the underlying mechanism and choose a treatment strategy. [31]

Depending on the severity of the process, we conventionally speak of an exacerbation phase, partial remission, and persistent remission. Exacerbations are provoked by infections, stress, hypothermia, prolonged sitting, and non-compliance with the treatment regimen. In real-life practice, the course of the disease is fluctuating. [32]

Finally, it is important to describe the phenotype: the predominance of pain, infection, obstruction, or a combined profile. Such a “portrait” facilitates the choice of treatment sequence. [33]

Table 4. Calculous chronic prostatitis in the coordinate system

Axis	Categories	How does it affect tactics?
Presence of infection	Is there a proven pathogen or not?	Determines the role of antibiotics
Stones	Endogenous or exogenous	Suggests mechanisms and interventions
Dominant phenotype	Pain, obstruction, infection	Selection of first-line therapy
Stage	Exacerbation, remission	Intensity of treatment
Sources: manuals and reviews. [34]

Complications and consequences

Without stones, chronic bacterial infections are prone to relapse, the formation of persistent biofilms, and recurrent episodes of cystitis and pyelonephritis. Repeated infections reduce quality of life and increase the risk of unwanted antibacterial exposure. [35]

Long-term pain and urinary dysfunction impair sleep, work performance, and sexual function. This impacts mental health and relationships, so a multidisciplinary approach is part of treatment, not an optional extra. [36]

Large exogenous stones and severe hyperplasia can increase obstruction and cause urinary retention. In such cases, endoscopic intervention is considered, often in conjunction with prostate hyperplasia surgery. [37]

In rare cases of severe disease that is not amenable to organ-preserving methods, more radical options are considered on a case-by-case basis, especially in cases of concomitant oncology. These are extreme situations that require a consultation. [38]

When to see a doctor

Consult a doctor if you experience perineal pain, urinary problems, painful ejaculation, or recurrent "bladder colds" that recur after seemingly successful treatment. The earlier the diagnosis, the lower the risk of a protracted course. [39]

Immediate care is needed for fever, chills, acute urinary retention, severe lower back pain, nausea, and vomiting—these may be signs of an acute complication. Such episodes require urgent evaluation and treatment. [40]

If you already have a diagnosis, but the symptoms are not controlled or antibiotics help only temporarily, this is a good reason to discuss the role of stones and change tactics: revision of the diagnosis, additional examination, multidisciplinary methods. [41]

If pain persists, don't delay talking about psychological support and pelvic floor muscle physiotherapy. These aren't "additional specialists," but rather about truly reducing pain and restoring activity. [42]

Diagnostics

The first step is a conversation and examination: the doctor will determine the duration of symptoms, their fluctuations, triggers, the effect of medications, the presence of recurrent infections, and their relationship with ejaculation. A digital rectal examination helps assess the severity of pain and rule out acute complications. At this stage, a hypothesis about the underlying phenotype is developed. [43]

The second step is laboratory verification of the infection and its location. The "gold standard" is the four-glass Miras-Stamey test with culture of successive portions of urine and secretions after prostate massage. In practice, the two-glass pre- and post-massage test is increasingly used, as it correlates well with the classic method and is easier to perform. [44]

The third step is visualization. Transrectal ultrasound allows one to visualize and count stones, assess their location and connection to the urethra, and detect signs of inflammation and congestion. Computed tomography is rarely needed and is usually reserved for large, dense stones or when planning an intervention; magnetic resonance imaging is used when indicated to rule out an abscess or cancer. [45]

The fourth step involves further testing as indicated: complete blood count, biochemistry, and urine cultures, sensitivity testing, testing for atypical pathogens, sexual function assessment, and symptom questionnaires. Prostate-specific antigen (PSA) levels are measured based on age and risk, keeping in mind that it may be elevated during inflammation; acute episodes require delayed measurement. [46]

Table 5. Diagnostic minimum and why it is needed

Stage	What are we doing?	For what
Anamnesis and examination	Symptoms and factors map	Determine phenotype and priorities
Two- or four-glass sample	Localization of infection	Resolve the issue of antibiotics
Transrectal ultrasound	Identify and describe the stones	Consider the "stone" tactics
Sowing with sensitivity	Choice of drug and duration	Minimize relapses
Additional tests	According to the readings	Rule out cancer and abscess
Sources: AUA 2025, EAU 2024, original test research. [47]

Differential diagnosis

It's important to distinguish calculous chronic prostatitis from chronic pelvic pain syndrome without infection. In the latter case, cultures are negative, and the leading causes are hypertonicity and triggers of the pelvic floor muscles, neuroinflammation, and central sensitization. Treatment in this case revolves around physiotherapy, pain management, and psychoeducation. [48]

The calculous process differs from prostatic hyperplasia by its pronounced pain component and a history of recurrent infections, whereas pure hyperplasia is characterized by predominantly painless obstructive symptoms. In practice, these conditions often coexist and require combined treatment. [49]

Lower urinary tract infections without prostate involvement typically present with an acute onset, burning sensation, and frequent urinary urination, but without prolonged pelvic pain or prostate tenderness. When recurrences occur with the same strain, we always suspect a reservoir of prostate stones. [50]

The list of differences also includes urethral strictures, chronic epididymitis, interstitial cystitis, and neurological pelvic pain. In controversial situations, the diagnostic route is developed by the urologist in collaboration with other specialists. [51]

Table 6. How calculous chronic prostatitis differs from “neighboring” conditions

State	What we usually see	What suggests against
Prostate hyperplasia	Obstruction without pain	No recurrent infection with one strain
Cystitis	Sharp start, burning sensation	No long-term pelvic pain
Nonbacterial pelvic pain syndrome	Negative cultures	Physical therapy and education help
Urethral stricture	A thin stream since childhood, injuries	No connection with prostate stones
Sources: AUA 2025, EAU 2024. [52]

Treatment

The initial strategy is to stratify the phenotype. If a bacterial cause is confirmed, antibacterial therapy is the mainstay, taking into account the sensitivity of the pathogen and the ability of the drug to penetrate prostate tissue. In practice, fluoroquinolones or alternatives are used based on culture results, and the duration of treatment is often longer than for cystitis. The goal is not only to alleviate symptoms but also to reduce the bacterial load in the ducts. [53]

The course of antibacterial therapy for chronic bacterial infections typically lasts 4-6 weeks, and sometimes longer depending on clinical and microbiological factors. If chlamydia or mycoplasma are detected, the regimens adopted for these pathogens are used, but with an extended duration. If a properly selected course of treatment is ineffective, it is necessary to reconsider the diagnosis and the role of the stones, rather than overdoing it with antibiotics. [54]

Medications that relax the smooth muscles of the bladder neck and prostate reduce obstructive symptoms and pain, especially if there are signs of outflow obstruction. They are often combined with anti-inflammatory drugs and analgesics, achieving a synergistic effect. Monitoring blood pressure and tolerance is important. [55]

Anti-inflammatory approaches include short courses of nonsteroidal anti-inflammatory drugs and topical pain management techniques. These are complemented by behavioral measures: heat treatments, workplace ergonomics, and breaks from prolonged sitting. Nutraceuticals based on pollen extracts and bioflavonoids are discussed separately; in some patients, they reduce pain and frequency of cravings as part of a comprehensive regimen. [56]

A key pillar is pelvic floor muscle physiotherapy with training in relaxation techniques, manual and myofascial modalities, and biofeedback. Often, it is the combination of physiotherapy and medication that provides breakthrough relief for pain and urinary issues, especially with prolonged sitting and stress. [57]

Modern non-invasive techniques, such as low-intensity perineal shockwave therapy, have been shown in a number of randomized trials to reduce pain and improve quality of life in patients with chronic pelvic pain syndrome. This method is considered an adjunct to standard therapy in selected patients with predominant pain that is resistant to standard treatments. [58]

If stones and obstruction are the primary concerns, endoscopic intervention is considered: during transurethral surgery for prostatic hyperplasia, simultaneous removal or fragmentation of stones is possible, improving outflow and reducing recurrence. The choice of energy—resection, vaporization, or laser enucleation—is determined by the center's experience and anatomy. [59]

In cases of recurrent stone-related infection after completion of an antibacterial course, short-term prophylactic regimens are sometimes discussed, but preference is given to addressing the anatomical and functional causes—obstruction, large stones, severe reflux. Long-term "suppressive" antibacterial therapy is a backup option, not the norm. [60]

Caution should be exercised regarding prostate tissue injection techniques and "flushes": some reports describe improvement, but the evidence is mixed, and the risks and standards are far from clear. Such approaches are only feasible in specialized centers and after standard options have been exhausted. [61]

Finally, it's not just the prostate that's being treated, but the person as well: psychoeducation, stress management, sleep modification, and treatment of associated sexual dysfunctions and depression all contribute to the final outcome. It's this multidisciplinary approach that most often brings the disease under control and prolongs remission. [62]

Table 7. How to select therapy based on the leading phenotype

Leading phenotype	Key measures	What to add
Proven infection	Antibacterial therapy with sensitivity	Localization of stones, decision on endoscopy
Obstruction and large stones	Endoscopic treatment and elimination of obstruction	Symptomatic and anti-inflammatory therapy
Pain and hypertonicity	Pelvic floor physiotherapy, pain relief	Shock wave therapy according to indications
Mixed profile	Combined tactics	Individual sequence
Sources: EAU 2024, AUA 2025, stone reviews. [63]

Prevention

Control of modifiable factors: regular breaks from sedentary work, moderate physical activity, normalizing body weight, and adequate fluid intake. These steps reduce pelvic floor muscle hypertonicity and improve drainage. [64]

Prompt treatment of urinary tract infections and caution with urethral manipulations reduce the risk of microbial colonization and intraprostatic reflux. After an episode of acute prostatitis, it is important to complete the full course of therapy and undergo follow-up. [65]

In cases of prostatic hyperplasia, it is helpful not to delay the discussion of medical or surgical correction of obstruction if it is severe and impacts quality of life. This may also reduce the risk of prostate stone formation. [66]

Patient education is a separate “medicine”: knowledge of the signs of an exacerbation, an action plan, understanding the role of physical therapy and self-help make remissions longer lasting. [67]

Table 8. Most effective preventive measures

Measure	For whom is this especially relevant?	Expected effect
Breaks from sitting and physical therapy	"Office" patients	Less pain and hypertonicity
Completion of antibiotic courses	After acute episodes	Fewer relapses
Correction of obstruction	For prostate hyperplasia	Better urine stream, fewer stagnant areas
Self-help plan	For everyone with chronic course	Longer remissions
Sources: AUA and EAU guidelines. [68]

Forecast

With properly selected, multi-level therapy, most patients achieve significant reductions in pain and dysuria and experience fewer exacerbations. The effect is particularly noticeable with a combination of targeted antibacterial therapy, obstruction correction, and physiotherapy. [69]

If the stones are large, multiple, and associated with severe hyperplasia, the prognosis improves after correcting the mechanical problem. Here, surgery becomes a logical step rather than a last resort. [70]

In some men, pain remains a dominant component even after the infection has cleared. In these cases, pain management and pelvic floor work, as well as psychotherapeutic support, become paramount. This shift in focus is not a sign of "hopelessness," but a reflection of the neuroimmune nature of pain. [71]

Relapses are possible, but their frequency can be reduced with a proper regimen, avoiding endless empirical courses of antibiotics. Consistency, realistic expectations, and shared decisions between physician and patient are essential. [72]

FAQ

Is it possible to cure chronic calculous prostatitis once and for all?
A significant proportion of men achieve long-term remission and symptom control. If stones and obstruction are the primary cause, their removal significantly improves the outcome. If pain is the predominant symptom, physical therapy and a multidisciplinary approach are key to success. [73]

Do everyone need antibacterial drugs for a long time?
No. Antibacterial therapy is indicated for proven infections and based on susceptibility. Long-term empirical courses without confirmation are more likely to be harmful. For non-bacterial pain phenotypes, non-drug methods are the mainstay of treatment. [74]

Is it always necessary to remove prostate stones?
No. Most stones are discovered without symptoms. Indications for intervention are discussed in cases of recurrent infection, large lymph nodes, severe obstruction, or during elective surgery for prostate hyperplasia, when both objectives can be addressed simultaneously. [75]

Do new methods, such as shockwave therapy, help?
In selected patients with a predominantly painful component, low-intensity shockwave therapy has been shown to reduce pain and improve quality of life as part of a comprehensive program. It is a complement to, not a replacement for, the basic steps. [76]

Why is transrectal ultrasound necessary?
To visualize the stones themselves, assess their number and location, and clarify their anatomy before planning treatment. This method is inexpensive, informative, and accessible. Computed tomography and magnetic resonance imaging are required selectively. [77]