A hair transplant procedure is a relatively low risk procedure. Your surgeon performs it using a local anesthetic after conducting all necessary exams and evaluations. However, it is still a medical procedure and there are a few side effects associated with it. A transplant that is prepared and performed under the best circumstances reduces the chance of any side effects appearing. In any case, your surgeon will be there for you every step along the way. The risks of a hair transplant procedure include the possibility that you will continue to lose hair from the rest of your scalp. Additionally, if your doctor is not experienced, the hair density of your new hair may be noticeably different than that of your donor area. This will result in different areas of the scalp being noticeably thinner. Consulting with an expert facial plastic surgeon, however, effectively reduces the chance of this happening in the first place.