In 65% of cases of scoliosis, the cause is unknown (or called idiopathic scoliosis), in 15% cases it’s considered congenital (born with it) and 20% of cases are caused by neuromuscular problems.
Scoliosis is characterized by the curves in the spine that deviate from the central line of the vertebrae, that normally should be a straight line.
In some cases, these deviations will cause pain or the inability to maintain correct posture. Scoliosis will have an effect on the nerves exiting each of the vertebrae or can cause premature degeneration of the vertebrae or discs.
What types of Scoliosis are there?

Infantile scoliosis: from birth to 3 years old
Juvenile scoliosis: from 3 to 9 years old
Adolescent scoliosis: from 10 to 18 years old
Thoracic scoliosis is curvature in the middle (thoracic) part of the spine. This is the most common location for spinal curvature.
Lumbar scoliosis is curvature in the lower (lumbar) portion of the spine.
Thoracolumbar scoliosis is curvature that includes vertebrae in both the lower thoracic portion and the upper lumbar portion of the spine.