The causes of lateral arch pain are many, the more common are trauma, infection, fasciitis, arthritis and so on, you need to go to the hospital, improve the examination, in order to clarify the cause of the disease. 1. Trauma: there is a clear history of trauma to the affected area, the cause of pain is mainly due to local soft tissue contusion, strain, or even fracture, localized swelling, fractures need to be given to X-ray film and other imaging tests. 2. Infection: mostly caused by bacterial infection, localized redness, swelling, heat and pain are typical manifestations, and in severe cases, abscesses can be formed locally, with fluctuating sensation on palpation, and accompanied by systemic manifestations such as fever and chills. 3. Fasciitis: mostly related to the affected area trauma, strain, etc., belongs to the aseptic inflammatory reaction of the fascia. 4. Arthritis: for example, traumatic arthritis, mainly caused by trauma, strain, osteoarthritis is caused by degenerative changes in the joints, rheumatoid arthritis belongs to the autoimmune changes, gouty arthritis is caused by high levels of uric acid in the body. It is recommended that the patient go to the hospital for examination in order to clarify the cause of the disease, and the professional physician will give the appropriate treatment for the cause of the disease.