The main symptoms of femoral head necrosis are pain, limited joint movement and, in severe cases, bilateral necrosis of the femoral head, resulting in difficulty walking and even paralysis. Pain is the most common symptom of femoral head necrosis. Early pain is not obvious, only localized vague pain and swelling pain, and the pain increases with the progress of the disease. The pain is located in the inner thighs and hip joints of patients, and in severe cases, the pain may radiate to the knee joints. The pain of femoral head necrosis is caused by the local inflammation caused by the necrotic tissue. The pain is caused by the local inflammation caused by the necrotic tissue. It may even lead to an increase in pressure in the bone lesion, so that there is more constant pain, even at rest. After femoral head necrosis, the shape of the femoral head will change significantly from round to oval or even triangular, which will lead to severe traumatic arthritis and limited movement of the hip joint, especially the rotation of the hip joint will be significantly limited and painful, and patients with femoral head necrosis will experience claudication. Patients with osteonecrosis of the femoral head can be diagnosed by x-ray of the lesion, or, in less obvious cases, by CT examination. If a patient is diagnosed with osteonecrosis, he or she should actively undergo treatment, such as oral medication, Chinese herbal medicine, physical therapy and, if necessary, femoral head replacement or even arthroplasty.