Treatment of tenosynovitis in children’s thumbs includes medication, braces, local closure, and surgery. The causes of tenosynovitis include fatigue injury, septic, connective tissue congestion and swelling and exudation, and tuberculosis. According to the different causes, tenosynovitis is divided into several categories: stenosing tenosynovitis, septic tenosynovitis, acute plasma tenosynovitis, and tuberculosis tenosynovitis. 1. Stenosing tenosynovitis: It can be treated conservatively with medication combined with supportive therapy, and the medication can be non-steroidal anti-inflammatory drugs such as ibuprofen, assisted by splinting. Local closure can also be used, if the effect is not good, surgery can be chosen. 2. Purulent tenosynovitis: anti-infective treatment can be used, you can use penicillin and other drugs, allergy to drugs is prohibited, if necessary, to take incision drainage. 3. Acute plasma tenosynovitis: anti-inflammatory and anti-rheumatic treatment is needed, such as non-steroidal anti-inflammatory drug ibuprofen, aspirin and glucocorticoid methylprednisolone, dexamethasone and so on. It is forbidden for those who are allergic to the drugs and those who have active peptic ulcers, and should be used under the guidance of a doctor. 4. Tuberculous tenosynovitis: anti-tuberculous treatment can be carried out, such as isoniazid, rifampicin, ethambutol, pyrazinamide and other drugs. Allergic to the drug is prohibited, should be used under the guidance of a doctor. Children’s thumb tenosynovitis need to be combined with the cause of the treatment, should go to the hospital, diagnosed and treated by a professional doctor, follow the doctor’s instructions for medication, not blindly self-medication.