Catatonic stupor is associated with signs that reflect lack of movement, including immobility, gaze, mutism, rigidity, withdrawal and refusal to eat, as well as more bizarre features such as posture, grimace, negativism, waxy flexibility, echolalia or echopraxia, stereotypy, literature and automatic obedience. , 
The leading and most noticeable manifestation of stupor is immobility. The patient can suddenly freeze at any moment in the most unexpected and uncomfortable position and keep it for a long time - for weeks and months. His muscles are enslaved, which helps to maintain the position of the body. He falls silent and communication with him during this period is difficult, and often simply impossible. Stillness and mutism were again identified as the most common symptoms observed in 90.6% and 84.4%, respectively, of patients with catatonic disease.
Sometimes the increase in symptoms occurs in stages. Initially, a sub-stage develops, the first signs of which are manifested by inhibition in movements and speech. The range of movements decreases, and mobility itself is greatly reduced, speech is slow, meager, words are spoken with difficulty, sometimes it seems that the patient slowly thinks over each word. Inhibition can gradually increase until it ends in complete immobility. A characteristic feature of the sub-stupid state is that patients do not feel inconvenience from inhibition, do not make complaints if they see a doctor. This condition is perceived by them quite naturally and does not burden them, as in other cases when inhibition develops for other reasons, for example, as a side effect of psychotropic drugs.
The development of a sub-stupor does not mean at all that a true catatonic stupor will develop. In clinical practice, the so-called small catatonia is more common. Symptoms of a sub-stage are manifested in the poverty of facial expressions, speech, limitation and angularity of movements. The patient even communicates with the doctor only involuntarily, turns away when talking, trying not to look at his vis-a-vis, selects words with great difficulty, answering questions.
Symptoms of a catatonic stupor may vary. It is by the prevailing symptoms that the types of catatonic stupor are distinguished:
- cataleptic (with phenomena of wax flexibility) - when the patient’s posture can be changed to any, the most bizarre and uncomfortable, and this position of the body will be fixed for a long time; wax flexibility usually gradually masters all muscle groups: first of all, such muscle phenomena occur in the masticatory muscles, moving from top to bottom on the cervical muscles of the arms and legs; a characteristic pose for a cataleptic stupor - the patient’s head hangs in the air, as if leaning on an invisible pillow; 
- negativistic - the patient becomes numb in a certain position and resists any attempts to change it; passive negativism is distinguished, when the position of the body is maintained through strong muscle tension, and active, when the patient not only resists, but also tries to make a movement opposite to the imposed one;
- stupor with numbness - the patient freezes in the fetal position in the mother’s womb or in the air cushion with the most severe muscular tension (complete immobility and the absence of reactions to stimuli, including speech).
Cataleptic stupor can be replaced by a negative, and then complete numbness in an embryonic position. Any kind of stupor can be accompanied by a lack of speech, despite the fact that the patient does not lose his ability to express himself. Mutism can be complete, periodic, and selective, with options for breaking silence inexplicable.
In the structure of the catatonic stupor, a number of specific symptoms are observed, their difference is uncontrollability and aimlessness:
- automatic humility - the patient obeys absolutely any instructions from the outside (the opposite of negativity);
- stereotypies - a constant repetition of any actions (movements, sounds, words), not pursuing any visible goal, in particular, yaktion;
- echo symptoms - a constant repetition of someone their actions;
- Pavlov's symptom - with the onset of the dark, stuporous patients begin to talk, eat and move, in daylight - they again fall into a stupor;
- a symptom of a ladder - loss of smoothness of movement, for example, a cataleptic patient changes the position of a part of the body with outside help, but not smoothly, but in portions, jerkily;
- symptom of "proboscis", characteristic of a stupor with numbness - the patient's lips are elongated with a tube, resembling the proboscis of an elephant;
- Bernstein’s symptom - when one limb of a patient is raised, and then another, the first one is lowered;
- Bumke symptom - the absence of a pupil reaction to a pain stimulus;
- symptom of the hood - the patient is fenced off by all means at hand, for example, hanging with a towel, a bathrobe, pulling the hem of a shirt or blanket over his head.
Frequently encountered postures of stuporous patients also have their names - a Bedouin symptom, an “air cushion” symptom, and “crucifix” (an extreme manifestation of catalepsy).
Catatonic stupor with mutism also has features, for example, stubbornly silent patients give a reaction, answering questions if they are pressed on the eyes (Wagner-Yauregg symptom), or asked to another person (Saarma symptom). Sometimes they answer questions asked in a whisper. 
In a stuporous patient, some somatic symptoms and signs of an autonomic nervous system disorder are also observed. Blue lips and nails can be observed, hypersalivation and hyperhidrosis, a decrease in blood pressure, swelling, etc. Are observed.
Catatonic stupor can be of different depths and durations; sometimes it acquires a chronic course. Many are interested in the question: is a person conscious in a catatonic stupor?
On this basis, there is also a classification of catatonic syndrome .
Empty catatonia is characterized by the described symptom complex in various combinations without the addition of productive disorders (illusory visions, delusions and hallucinations). After exiting the attack, the patient can tell what was happening around, that is, his consciousness was not disturbed.
The presence of delusional hallucinatory symptoms does not mean that the patient's consciousness is necessarily impaired. Catatonic stupor, when the patient is conscious, that is, he correctly identifies himself and can subsequently correctly reproduce the events that have occurred, refers to lucid or pure catatonia. Without impaired consciousness, a catatonic stupor usually develops with schizophrenia (lucid catatonia).
Attacks with stupefaction include the oneiric-catatonic stupor with a visual-figurative delirium of the imagination. The patient in this case experiences a catatonic dream in which he is the main character. It is saturated with bright unreal events, with an intense emotional coloring, and the dream has a certain content. Coming out of the oneiric-catatonic state, the patient cannot remember what happened to him in reality, but he can describe the events that occurred in a dream very accurately. The oneiric-catatonic stupor continues for a long time - several days, and sometimes weeks. Onyroid develops with a stupor in epileptics, patients with injuries and tumors, after severe infections and poisonings, with paralytic dementia. More often in such patients, the basal nuclei of the brain are affected.
Lethal catatonic stupor develops in schizophrenics and people with impaired affect in the form of acute psychosis. Outwardly, the symptoms resemble oneiric stupor, but the development is rapid, and not only psychotic, but also somatic manifestations are growing. It is also called febrile, since one of the main symptoms is hyperthermia or jumping temperature (with normal catatonia, the patient's body temperature is normal). In addition to fever, the patient has a frequent pulse and rapid breathing, on the face - the so-called “Hippocrates mask” (earthy gray color, pointed features, sunken eyes, wandering eyes, dry lips, sweat droplets on the forehead, plaque on the tongue). The condition is reversible, but requiring urgent measures (in the first hours), otherwise it can take a malignant course. 
The catatonic syndrome in children is manifested mainly by the development of arousal, and then in rudimentary forms - uniform actions: bouncing, patting, pendulum-like walking from object to object, meaningless cries, pretentiousness, grimaces, etc. More often such excitement encompasses children in the late afternoon or when guests arrive. Unfolded adult cases of catatonic stupor are observed already in adolescence. Yet this is rare. Therefore, the catatonic stupor in childhood has not been studied and described enough, although in general, the symptomatology does not differ from this pathology in adults.