Lumbar scoliosis can cause a host of internal complications. This is due, in particular, to a change in the location of certain organs from the deformed side. The most commonly affected urinary, digestive, reproductive system, as well as blood circulation.
Already some time after the formation of a scoliotic arch in the human body, the risk of developing irreversible changes in the cardiovascular apparatus increases significantly. The arterial blood flow does not receive enough oxygen, the internal size of some heart chambers increases, and a condition similar in symptomatology to pulmonary heart disease occurs. Even after the correction of scoliotic deformity, the indicators of cardiac activity no longer return to normal. And such a consequence is far from the only one. Among the most common complications:
- chronic pain syndrome;
- disorders of the digestive system and genitourinary system, systematic intestinal flatulence, constipation;
- infertility in women, congestion in the pelvic area;
- nervous pinching, paresis and paralysis;
- the development of cascading fractures; 
- swelling of the lower extremities;
- weakening of the muscle tone of the abdominal wall;
- psychological disorders, depression, neuroses caused by defects in appearance.
As a result of the compression of blood vessels against the background of vertebral artery syndrome, cerebral blood supply deteriorates, which in childhood is manifested by impaired memory and thought processes. Children have learning difficulties. 
In adolescence, neurological symptoms are often found.
Can lumbar scoliosis disappear in a child?
The curvature can be corrected at an early stage if you follow the simple recommendations of specialists. For example, it is important to explain to the child how important it is to take breaks from work, and during recess not to stay at the desk, but to stand up, walk or run, stretch, and make several bends with the body. Even a couple of exercises will help keep your back muscles in good shape.
Another important condition is not to carry a briefcase or backpack, but a special knapsack with an orthopedic back. All accessories in it should be stacked evenly and neatly, and not chaotically. Overloading the back should be avoided, but it is also not recommended to carry a briefcase in your hands or on one shoulder: this can aggravate the skew of the spine.
The sooner measures are taken to eliminate the deformation, the greater the chances of a cure. Additionally, it is imperative to connect manual therapy and therapeutic exercises. Only in this case, you can count on the correction of the pathology. 
Lumbar scoliosis hernias
A hernia is a kind of extrusion of the intervertebral disc outside the fibrous ring as a result of its rupture. The spinal column, weakened by curvature, often acquires such hernias, and this complication is difficult to avoid. 
A hernia with lumbar scoliosis has its own characteristics: the protrusion is directed into the intervertebral canal, presses down on the nerve ending, and an acute pain syndrome develops. In such a situation, it is not enough just to relieve the pain. Against the background of curvature, the hernia will continue to increase, so the symptoms will again make themselves felt, and the clinical picture will become more diverse:
- severe pain will appear due to extensive irritation of the nerve fibers;
- the lower extremities will regularly go numb, up to the development of tissue dystrophy;
- swelling, fatigue in the legs, pain will disturb;
- the performance of the digestive tract (in particular, the intestines) and the urinary system will be disrupted.
Both scoliosis and hernia are curable conditions provided that they are diagnosed in a timely manner and treated appropriately. But neglected cases are already difficult to treat or are not treated at all, the patient becomes disabled. 
Sacralization of the lumbar spine in scoliosis
Sacralization is a congenital defect of the spinal column in which the fifth lumbar vertebra is to some extent attached to the sacrum. This pathology often accelerates the development of osteochondrosis or spondyloarthrosis. 
Sacralization is accompanied by an increase in pressure on the lumbar segments, which are located above the fusion site. Under the usual average load, the spinal column copes with its tasks, however, with an increase in pressure on the vertebrae (for example, with lumbar scoliosis), a congenital disorder makes itself felt.
Pathology can manifest itself on the right, left, or on both sides of the vertebra. Partial fusion is observed with cartilaginous and articular forms of the disease, and complete fusion occurs with bone sacralization. 
Severe clinical symptoms in scoliosis with sacralization are rarely observed, the general well-being of the patient practically does not suffer. If there are manifestations, then the only method of treatment is surgery, although in practice the surgeon is rarely asked for help.