One leg is long and the other is short, i.e. long and short legs. Correction of long and short legs needs to be done with a clear understanding of the cause of the condition, common causes include pelvic tilt, mild scoliosis, hip dysplasia, hip dislocation, severe scoliosis, etc. They can usually be corrected by exercise through sports rehabilitation, and in severe cases, surgical correction may be required. 1. Long and short legs caused by pelvic tilt or mild scoliosis: this condition can be corrected through exercises, such as deliberately adjusting sitting and standing postures to the correct position; using the weak side of the leg more when walking or exercising; strengthening the waist and abdominal muscles on the side of the long leg and stretching and loosening the waist and abdominal muscles on the side of the short leg, etc. The above exercises need to be evaluated and guided by a rehabilitation physician. The above exercises should be carried out under the guidance of a rehabilitation physician. 2. Hip dysplasia, hip dislocation, severe scoliosis: In these cases, the condition cannot be corrected by rehabilitation exercises and requires surgical treatment. It should be noted that all people’s lower limbs are not absolutely equal in length. Generally speaking, it is related to life habits, habitual use of the legs, etc. As long as there is no impact on life, no discomfort, and does not affect the appearance of the lower limbs, it does not need to be adjusted. If the double lower limbs are seriously unequal in length, affecting life, or leading to changes in the pelvis or spine, you should consult a doctor in time, and choose an appropriate correction program after a clear diagnosis.