Hair transplantation is generally safe and reliable, but there may be hazards such as infection and swelling. 1. Hair transplantation refers to removing healthy hair follicle tissue from the occipital region of the back, and then transplanting it to the hair loss area in the direction of natural hair growth after processing and cultivation. Usually, hair transplantation under the operation of qualified professional doctors is safer and more reliable. 2. If deep tissues are injured during hair transplantation, localized swelling may occur. If you do not take proper daily care measures after the hair transplant surgery, such as touching the hair transplant site or getting the site wet, it may increase the chance of infection, which may lead to localized redness and pain. After hair transplantation, you should avoid eating stimulating and spicy food, so as not to irritate the skin and affect the recovery. Patients who want to have a hair transplant are advised to go to a regular hospital and consult a professional doctor for advice.