Differences in limb length can vary, from a diminutive difference, to a difference of multiple inches between legs, which throws off the entire body's balance and gait. Serious LLD causes asymmetric deformities that can create pain, injury, biomechanical problems and incorrect gait patterns. Common symptoms of LLD are knee pain, foot pain, nerve pain in legs, lower back pain, poor balance, finding it uncomfortable to stand and habitually leaning on one leg to stand. When a bone has been shifted due to an injury/surgery or when a bone does not mature properly, this can create LLD. So a person with LLD must compensate for this asymmetrical and abnormal body structure, trying to reach equilibrium and therefore shifting their balance, flexing a knee, etc., which makes them vulnerable to injury, pain or biomechanical defects.