The most obvious symptom of pyriform myositis is usually buttock pain, in addition to pain in the posterior lateral thigh and so on. 1. Hip pain: when the pyriformis muscle is affected by long-term compression, trauma or strain and other factors causing aseptic inflammation of the pyriformis muscle, hip pain, swelling, spasm and other symptoms occur. 2. Posterolateral thigh pain: when the local aseptic inflammatory reaction of the pyriformis muscle stimulates the sciatic nerve, it will result in neuropathic pain, which is commonly seen in the posterolateral thigh pain, and pain in the distal end of the lower limbs will also occur in some cases. 3. Localized cold stimulation can also lead to pyriform myositis. When pyriform myositis occurs, hot compresses are also an effective way to relieve the symptoms, and traditional Chinese medicine physiotherapy can also relieve the symptoms. In addition, anti-inflammatory and analgesic medications, such as diclofenac sodium and acetaminophen, are also needed. Medications should be taken under the direction of a doctor.