Many people will have local hard knots on their buttocks after muscle injection, the hard knots are produced by the drug stimulating local lumps, which do not need special treatment, and will slowly fade and become soft after a few days for those who are not sensitive; some people may not fade for a long time, so pay attention to reduce local friction and do not touch hard, which will not affect normal life. If the local reaction is heavy, resulting in itching, redness, swelling, pain, you can use topical softening drugs, also has a certain effect, generally do not need surgical intervention. If the symptoms are not relieved or local ulceration or exudation occurs, go to a regular hospital for treatment in a timely manner.