If you are on anti-clotting medications such as Coumadin, you would have to stop taking them for awhile before having a hair transplant. People who have a history of excessive scarring might want to think twice about getting a hair transplant. Scars are usually a part of the procedure because the donor hair is taken from the back and sides of the scalp. The grafts will be more permanently set into place when the technicians dry them by blowing a cool blow dryer across them. This makes them adhere in their place so that no bandages are necessary. The patient will be asked to bring, or will be given, a baseball cap for the ride home from the hair transplant procedure. You should figure that the average number of hair transplant grafts needed to cover a balding area is 25% of the original hair that was there. You can move up or down from this figure according to your other factors such as thickness, curliness, or color. Then, you can use this number to figure up the grafts needed. They must also use this to help the hair to lie flat. Because the eyebrow hair is made of individual hairs, hair transplant surgery must involve creating those single units of hair. To do this, hair is taken from the scalp, just as in other hair transplant procedures. Then, the follicular units are divided into individual hair grafts. Virtually every doctor has some procedure that has gone wrong to some degree. A good doctor will admit this and provide a plan to avoid it. There are hair transplant stories that would make most people think twice about having the surgery. However, it is not a good representation of the fine work that most hair restoration surgeons are doing. If you have a hair color that is similar to the color of your skin, you are in luck. Your scalp will not betray any lack of coverage that happens to be present. If, on the other hand, your hair and skin color contrast distinctly hair follicles show up more. If there is even the slightest lack of coverage, it will be evident.