Small needle knife short-term treatment effect is obvious, do more may increase the risk of infection, damage to blood vessels, nerves and scarring. Clinically, it is used to peel off the adherent tendons and soft tissues to treat tenosynovitis, chronic soft tissue injuries and other diseases. Doing it too much can also cause certain effects on the body. 1. Infection: The knife is an invasive treatment that requires penetration of the skin tissue, so there is a risk of infection. Wounds should be cared for after surgery. Pay attention to avoiding water, to prevent wound contamination caused by infection. 2. Damage to blood vessels and nerves: Since the front end of the knife has a blade, improper operation after entering the skin may result in damage to tendons and nerves, which may lead to sensory loss in the innervated area. In addition, small blood vessels may also be injured during the treatment operation, resulting in localized swelling. 3. Scarring: Repeatedly performing the same part of the knife treatment many times will easily lead to scarring. Small needle knife is an invasive operation, it is recommended to go to a regular tertiary hospital in time to receive standardized treatment.