The best treatment for tendonitis of the foot mainly includes conservative treatment and surgery, as follows: 1. Conservative treatment: If the symptoms of tendonitis are not very obvious, or are accompanied by mild pain, you only need to rest, avoid strain, weight bearing, strenuous exercise, and at the same time pay attention to warmth, avoid cold, oral and topical anti-inflammatory and analgesic or blood pain relief drugs. If the pain is severe and there is no significant relief after the above treatment, local closure therapy can be performed. 2. Surgery: If there is still no relief after closure therapy, or even if there is a limitation of activity, surgery is needed to completely cure the tendon sheath. Therefore, the best treatment for tenosynovitis is still determined on a case-by-case basis. If it is mild, conservative treatment can be used. If it is more severe or if conservative treatment is not effective, surgery is required.