The following are precautions to take before hair transplantation: 1. Patients using hair growth agents need to stop using hair growth agents one month before surgery. 2. Wash your hair with shampoo the night before surgery and the morning of surgery. 3.Stop using vitamins and aspirin one week before surgery. 4.Beverages containing alcohol are prohibited two days before the surgery. 5.The doctor should be informed whether the hand suffers from other diseases (such as diabetes, hypertension, heart disease, etc.) before the surgery. 6.The doctor should be informed of the medications currently being taken before the surgery. 7.On the day of surgery, you should wear wide, comfortable and soft clothes with buttons or zippers in front, avoid wearing and taking off inconvenient pullovers or sweaters, etc. Eat normally before surgery, make sure not to fast, and avoid alcoholic beverages and greasy foods.