Tenosynovitis refers to the aseptic inflammation that occurs in tendons and their tendon sheaths, which is mainly caused by a series of clinical manifestations such as tendon and tendon sheath congestion, edema, inflammatory exudation, fibrous hyperplasia, formation of tendon nodules, and stenosis of the tendon sheaths, among other pathologic changes. It is most common in the flexor tendons of the middle finger, ring finger and digit flexor, as well as the extensor digitorum longus and extensor hallucis longus tendons at the radial styloid, followed by flexor digitorum brevis tendon, long head tendon of the biceps brachii, ulnar extensor carpi ulnaris tendon at the ulnar styloid, and flexor tendon of the second phalanx, and other parts of the tendon. Mostly due to tendon strain. It is often seen in people with heavy manual work. Clinical manifestations The course of the disease is long, and it can also develop acutely after excessive activities. Early patients only feel the corresponding parts (such as the metacarpophalangeal joints, wrist joints) soreness and discomfort when they wake up in the morning, which can disappear after activities. With the progression of the disease, local pain, swelling, pressure pain, pain aggravated by activities, finger movement is limited, friction sound, popping, or atresia phenomenon. Localized tendon sheaths can be touched with nodular elevation. Corresponding tendon flexion and extension pain, popping, resistance test (+). Diagnostic basis 1. Pain in the tendon sheath area, tenderness, aggravated by activity. Hard knots are palpable with popping sound. Resistance test (+). Fist shaking ulnar deviation test (+) in the case of stenosing tenosynovitis of the radial tuberosity. 2. There is a history of strain injury in the corresponding area. 3. No localized redness, swelling, or fluctuating sensation. No fever. Auxiliary tests: routine blood test, ESR, CRP, X-ray film, etc., to detect septic and tuberculous tenosynovitis and local bony lesions. Treatment principle Rest and recuperation, anti-inflammatory and analgesic. For mild symptoms, rest and recuperation, reduce the activity of the affected tendon, and apply local hot compresses or topical ointment. 2.If the symptoms are more serious, intratendinous block, ozone injection. The principle of aseptic operation should be strictly observed. Immunocompromised people (such as diabetes, the elderly and the weak), or local edema, after blocking the need for oral antibiotics for 3 days to prevent infection. 3, joint popping obvious, flexion and extension interlocking phenomenon is more significant, feasible small needle loosening treatment 1-2 times. If the effect is poor, then the tendon sheath needs to be surgically dislodged.