If the bruising occurs after the needle is inserted, it is necessary to determine whether the needle opening continues to bleed, and if it continues to bleed, it is necessary to press the needle opening with a cotton swab or cotton ball to prevent the local subcutaneous bleeding from continuing, generally after 3-5 minutes of pressure, the bleeding stops, and a cold compress can be applied immediately. In addition, after 24 hours, local hot compresses can be applied, such as salt bags, hot water bags or hot towels, and the traditional method of rolling back and forth with boiled eggs is also a good way to promote blood circulation and speed up the swelling of the bruise. If you have conditions, you can go to the hospital to do some physical therapy, such as infrared therapy, microwave therapy, etc., can promote the absorption of bruises.