Tenosynovitis of the wrist occurs when excessive flexing and extending movements lead to an inflammatory reaction between the tendons and the tendon sheaths. This can cause adhesion, fibrosis, and even sterile inflammation, leading to symptoms of pain and restricted movement. For tenosynovitis, it is first recommended to rest and reduce flexing and extending movements. Physical therapy, such as infrared therapy, can be used to alleviate the local inflammatory response. If necessary, non-steroidal anti-inflammatory pain medications can be used for symptomatic treatment. If the above treatments are not effective, local injections may be recommended for management.