If family members cannot be present, the doctor might ask for photos. One trick of doctors, who work to give young people hair transplant surgeries, is to guide them in setting the hairline. A young person will usually want a fairly low hairline. He remembers the way it was just a few short years ago and wants to duplicate the image. Burns, tattoos, and infections can cause the eyebrow hair to fall out, and some people just are not able to grow eyebrows at all. Hair transplant surgery for eyebrows is different because eyebrows are different from scalp hair. For one thing, the hair has a distinct growth pattern with each section of the eyebrow pointing in a different direction. Often people have sensitive scalps and the thought of someone making cuts there seems hard to think about for these people. There is disagreement as to whether hair transplant surgery is painful, though. Some say that hair transplant surgery is similar to a visit to the dentist. This does not seem like a description of something that is pain-free. More grafts can be done at one session, so that the patient has to go back fewer times. This is more convenient to patients. Hair transplant done using follicular unit procedures is becoming more and more the norm. Possibly this is because it puts hair into the scalp in the same arrangement as it grows there naturally. However, a light-skinned man with very dark hair will need much more hair to provide the same amount of coverage. 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. It could be camouflaged by wearing the hair just a little longer. Other patients have rubbery skin that stretches too much and so causes wide donor scars. These two groups add up to about 5% of the patients who have hair transplant surgery. The other 95% of patients have no problems with their tiny scars at all.