Sometimes, they will try to make you believe they do better work than they do. They will show you pictures that are not true examples of their own work. They might show you photos that they have taken using lighting tricks to make the hair look thicker and healthier than it is. It is often hard to spot such tricks, but knowing that some surgeons do them will help you to watch out for them. 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. To get 25% of that, you would need 156 follicular units per square inch. Scar revision surgery is usually done at a flat fee, perhaps around $1000 for the procedure. The normal hair transplant procedure will cost differently depending on the number of grafts even though the cost per graft goes down the more grafts you have. For example, 100 grafts may cost you $1500, while 3000 grafts may cost about $12,000. The cysts do not usually last more than a few weeks and are rarely more than the size of small pimples. 10. Scarring. If you have keloid scarring after hair transplant surgery, it is probably because you are genetically inclined to have it. Very infrequently, patients have scarring that takes the form of ridges. 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. It is necessary to clean gently but thoroughly. At first, you may find yourself rinsing your hair many times a day. Just be sure that you do not bother the hair transplant site by scratching or rubbing it. Your hair transplant doctor will want you to come in for a check of your transplants about a week after your surgery.