The difference between gluteal fasciitis and pectus excavatum lies in the difference in etiology, symptoms, and examination. 1. Etiology: the cause of gluteal fasciitis is not clear, generally may be related to the aging of the skeletal system, tissue trauma, immune diseases and other factors. Patients with pectus excavatum are usually caused by factors such as crush injuries, puncture wounds or chronic strain injuries to the buttocks. 2. Symptoms: Symptoms of gluteal fasciitis usually appear in the buttock pain, stiffness, etc. Usually not accompanied by thigh pain and sciatic nerve pain. In addition to hip pain and stiffness, patients with pyriform myositis also have radiating pain in the lateral thigh. 3. Examination: Electromyography is mainly negative in patients with gluteal fasciitis, and there is no edema signal in MRI. Patients with pyriform myositis have a positive EMG and a signal of pyriform muscle edema on MRI. When patients are not sure of the disease, they should go to the hospital in time for examination and symptomatic treatment under the guidance of doctors.