Tendonitis occurs mostly in the area of tendon attachment, usually around bones and joints. Commonly affected areas are the fingers, wrists and shoulders. Tendonitis is mainly caused by incorrect working postures and bad lifestyle habits, or it can be caused by repeating certain movements over a long period of time. Poor posture and movements can repeatedly pull on the tendon attachment points, causing local edema, leading to aseptic inflammation and the production of prostaglandins and tumor necrosis factor-like inflammatory substances, which can irritate the peripheral nerves and cause pain. If the patient’s symptoms are severe, it may lead to localized swelling, joint ankylosis and dysfunction. When uncomfortable symptoms appear, you should consult a doctor in time, improve the examination, clarify the cause and diagnosis, and standardize the treatment under the guidance of a professional physician.