Aspirin affects platelets, and will typically cause more bleeding during even minor surgical procedures. This is especially important in hair transplant procedures because extra or excessive bleeding can affect the overall survival of your grafts.Your primary care doctor or cardiologist will always have the best advice regarding aspirin and whether or not you can discontinue it for ten or so days. While we would always love to have you as a patient, most hair restoration surgeons, myself included, aren't willing to take the risk of harming your heart or other vital organs in order to perform a hair transplant surgery, unless your primary doc or specialist agrees that it is okay for you to discontinue aspirin.