Tendinitis refers to the condition where the tendon sheath around a tendon becomes inflamed due to chronic strain, resulting in a sterile inflammation that affects the movement of the tendon sheath and causes localized pain symptoms. If the symptoms of tendinitis are mild, one can opt for topical non-steroidal anti-inflammatory drugs and pay attention to rest to alleviate the symptoms. If the symptoms are severe and cause restricted movement, surgery is recommended to clean and remove the severely affected sheath to relieve symptoms.