Then, you can use this number to figure up the grafts needed. Based on the fact that the average Caucasian male has a density of 2 hairs per millimeter, it can be assumed that the average density of hair is 1250 hairs per square inch. Figuring at an average of 2 hairs per follicular unit, it would take 625 follicular units per square inch. The surgeon may want to take them out, break them up into smaller units, and reinsert them. If your plugs are smaller, he may just want to add some new donor hair to lessen the effect of the doll head look. If cost is an issue with you, discuss it with your surgeon. Cost is a very real problem for many who want to have bad hair transplants fixed. If a patient is known to suffer from keloid scarring, the first thing a reputable doctor will do before hair transplant surgery is to explain the possibility of unsightly scars. This requires a very honest surgeon, since the patient may decide the procedure is not worth the scarring it will cause. The next step with such a patient would be to discuss ways the keloid could be covered. The hair forms a sharp angle so that it grows out and then flat to the face. Scalp hair has a much gentler angle. Eyebrow hairs do not grow in the same type of follicular units as scalp hair. Rather than growing in groups of one to four hairs, they are simply single strands of hair. You can see this if you look carefully in the mirror at your eyebrows. A new procedure allows doctors to use donor hair from other parts of the body. For example, if a man has a particularly hairy chest, some hair can be used from that area as donor hair for the head. This hair transplant procedure requires a surgeon skilled in the latest techniques in order to keep scarring to a minimum. Preparing for Hair Transplant Surgery Hair transplant can make you look younger and more attractive. Your doctor will need to prepare you for the surgery so that you will know exactly what to do to make the procedure go better. If you follow instructions, you will have a much better outcome. When the doctor sees you a couple of weeks before surgery day, she will go over again exactly what procedure you are getting.