Overview
Scoliosis is an abnormal side-to-side curvature of the spine that is often accompanied by a twisting (rotation) of the vertebrae. It most commonly begins during childhood or adolescence (adolescent idiopathic scoliosis) or can develop later due to spine wear-and-tear (degenerative scoliosis). When the curve is moderate to severe, it can change how the spine and ribs align, which may contribute to back discomfort, stiffness, and changes in posture. Nerve irritation can occur in some people, leading to pain or numbness that may extend into the legs.
Symptoms
Many people notice uneven shoulders, an uneven waist, or a visible curve in the back, sometimes with a rib hump when bending forward. Back pain and stiffness are more common in adults and in larger curves, and discomfort may worsen with prolonged standing, sitting, or certain twisting activities. Some individuals experience fatigue or reduced ability to exercise comfortably due to mechanical strain. If nerves are affected, symptoms can include tingling, numbness, or weakness in one or both legs.
Causes
The most common cause in adolescents is idiopathic, meaning no single reason is identified, though genetics and growth-related factors likely play a role. Degenerative scoliosis develops when age-related changes in discs and joints gradually alter spinal alignment. Less commonly, scoliosis can be related to neuromuscular conditions, congenital spine differences present from birth, injury, or connective tissue disorders. The spinal curve progresses when growth or degeneration continues, especially in the presence of certain curve patterns.
Risk Factors
Family history increases the likelihood of adolescent idiopathic scoliosis. Growth spurts during childhood and early adolescence can influence whether a curve progresses. In adults, risk rises with age, prior spine problems, and degeneration-related disc or facet joint changes. Neuromuscular disease, congenital spine abnormalities, and certain connective tissue disorders can also increase risk.
Prevention
Scoliosis itself cannot always be prevented, especially for idiopathic or congenital causes. For people at risk of progression, maintaining good overall spine health through regular strengthening of core and back muscles, flexibility work, and physical conditioning may help improve function and tolerance for activity. Avoiding sedentary habits and using ergonomic supports can reduce strain on the back. In those with known scoliosis, early monitoring during growth and consistent follow-up with a clinician can help address progression sooner.
How the Diagnosis Is Evaluated
Clinicians start with a history of symptoms, growth history (for younger patients), family history, and any prior spinal conditions. A physical examination typically includes observing posture and performing a forward bend test to look for rib hump or asymmetry. Imaging is usually confirmed with standing X-rays, which measure curve size (often using the Cobb angle) and help determine progression risk; not every patient needs advanced imaging. If there are neurologic symptoms, clinicians may order additional tests to evaluate nerve involvement.
Nonsurgical Treatment Options
For mild curves, observation with periodic re-exams and repeat X-rays is often the main approach to watch for progression. Physical therapy and a structured exercise program can improve posture awareness, core strength, flexibility, and breathing mechanics when rib rotation is present, which may reduce pain and stiffness. Bracing is commonly used in children and adolescents who are still growing and have curves at higher risk of progression; the goal is to help slow or prevent further curve worsening. Pain control may include activity modification, heat or cold, and over-the-counter anti-inflammatory medicines if appropriate. When pain persists or nerves may be involved, targeted treatments such as trigger point injections or corticosteroid injections into relevant pain generators may be considered by a specialist as part of a broader plan.
When to Seek Medical Attention
Seek prompt medical evaluation if you notice rapidly worsening asymmetry, a new or accelerating spinal curve, or significant back pain that does not improve with conservative measures. Get urgent care if you develop progressive weakness, trouble walking, numbness that is worsening, or symptoms suggestive of nerve compression. Seek immediate attention for red flags such as fever with back pain, major unexplained weight loss, bowel or bladder changes, or severe pain after trauma. In growing children, early evaluation is important if scoliosis is suspected so progression can be monitored during growth.
Frequently Asked Questions
Scoliosis can be idiopathic, related to degeneration over time, congenital, neuromuscular, or less commonly linked to other medical conditions.
Physical therapy cannot reliably "straighten" the bony curve, but it can improve strength, flexibility, posture, and pain, and it may help reduce functional limitations.
Injections are sometimes used when specific pain sources are identified or when symptoms suggest nerve involvement, typically alongside physical therapy and other conservative care.
Next Steps
If you suspect scoliosis or have noticeable back asymmetry, schedule an evaluation with a clinician experienced in spine assessment. Ask whether your situation is mild enough for monitoring, whether physical therapy or bracing is appropriate, and what follow-up timeline fits your curve and age. If you have leg numbness, weakness, or bowel or bladder changes, seek urgent medical care.