The clinical symptoms of femoral head necrosis vary depending on the site of occurrence and the extent of necrosis necrosis. Most of the osteonecrosis within the femoral head is stationary and has no clinical symptoms, while small-scale osteonecrosis is mostly symptomatic but has less impact on function. Pain is a symptom that occurs in every patient with ischemic necrosis of the femoral head. At first, there is soreness, discomfort or stiffness in the hip, thigh or lumbar area, and the pain is mostly intermittent. Later, as the disease develops, the pain and stiffness gradually increase, with the most obvious in the thigh root area, hip area, inner thigh to knee area. The pain is usually worse when standing and walking, with radiating pain from the thigh root area to the knee, and relieved after rest. The nature and extent of pain, as well as the time and location of pain, can vary greatly from person to person, from cause to cause, and from stage to stage. The presence of pain often suggests that femoral head necrosis has been present for some time, and claudication is usually another distinct symptom that appears at the same time as pain. Early onset of ischemic necrosis of the hip joint in patients can cause claudication, which is another manifestation of the autonomic protective or pain reflex.