Swelling of the index finger caused by tenosynovitis can be relieved by rest and braking, physical therapy and medication. 1. Rest and braking: After the index finger is swollen with tenosynovitis, it is recommended to rest as much as possible for the time being, reduce the activities of the finger, especially the weight-bearing activities, avoid using the computer, and limit the activities of handwork, etc., so as to avoid further aggravation of the injury. 2. Physiotherapy: hot towels or hot water bags can be used to apply hot compresses to the index finger area, or the use of physical therapy methods such as baking electricity to improve local blood circulation and promote the absorption of inflammation. 3. Medication: Oral non-steroidal anti-inflammatory drugs such as ibuprofen, diclofenac sodium, celecoxib, etc., or topical diclofenac diethylamine emulsion, anti-inflammatory and anti-swelling treatment, which can significantly reduce swelling and pain. All of the above medications should be used under the guidance of a doctor, avoid self-medication.