After having a small needle knife in the hand joint, patients should pay attention to the sterilization of the affected area, limiting their own activities, and eating a light diet. 1. Sterilization of the affected area: patients who have small needle knife for hand joints often suffer from tenosynovitis, and wounds will be produced after piercing the skin with small needle knife. In daily life, to avoid infection, patients should be sterilized from time to time and avoid touching water. 2. Limit their own activities: after the small needle knife, patients should limit their own activities, avoid too intense exercise, so as not to cause the affected area of the pull. 3. Eat a light diet: patients can eat vegetables and fruits, and avoid spicy and stimulating food, so as not to cause inflammation. If patients experience discomfort after undergoing mini-needling, they should go to the hospital in time.