Pain and discomfort at the root of the thigh when lifting the leg may be localized synovitis, or problems such as femoral head necrosis, or infectious diseases of the hip joint, such as tuberculosis or septic arthritis. You need to go to the hospital to see an orthopedic surgeon and make a preliminary judgment with physical examination. Local places can be examined by X-ray to see if there is typical femoral head necrosis, and if necessary, consider MRI to find out if there is obvious hip joint effusion and early femoral head necrosis. Localized local ligament muscle strains may also occur when lifting the leg and pain at the root of the thigh. Local places can be plastered, such as flurbiprofen babble cream as well as physiotherapy, temporarily avoid walking, strenuous exercise, helps to relieve. The pain is obvious temporarily you can take oral painkillers, such as Fenbid, and actively look for the cause and treat the cause.