Three months baby hip dysplasia appear long and short legs, early can support or plaster correction, if the effect of conservative treatment is not good, can consider surgical treatment. 1. Rehabilitation therapy: if hip dysplasia is relatively mild, it can be treated by doing rehabilitation exercise therapy, combined with manipulation massage and pulling, and also can be corrected by brace or plaster, so that the hip joint is in the position of abduction and flexion, and then a better therapeutic effect can be obtained. 2. Surgical treatment: when the baby is more than one and a half years old, the effect of conservative treatment is not good, can consider surgical treatment, hip joint capsule cut and reset, pelvic osteotomy. Hip dysplasia in three-month-old babies, it is recommended to go to the hospital in time, the earlier the treatment, the better, otherwise it is easy to affect the therapeutic effect, and may even lead to leg disability.