Pain in the left iliac region can be caused by a number of conditions, and patients can be aided in the diagnosis by the time of onset of the pain, the duration of the pain, and what triggers the pain. If the pain is more intense, after walking for a long time as well as standing for a long time, the nature of the pain is mainly tingling. If the pain is not relieved by lying down and resting, localized hot compresses and oral medication, if the pain lasts for more than years, and if the patient is over 40 years of age, has a personal history of prolonged smoking and drinking, and long-term use of large amounts of hormones, this type of iliopsoas pain is considered to be caused by necrosis of the femoral head. In some patients, the pain is mild, and the symptoms are relieved after resting, taking medicines for activating blood circulation and removing blood stasis, and applying ointment, which is considered to be caused by iliac osteoarthritis. This is a kind of sterile inflammation can be healed slowly, and patients should avoid labor and rest more in daily life.