There are sebaceous glands in the follicular unit which produce oil. The follicular unit is a living unit with muscle, nerves and blood vessels that are all tiny enough to fit into this small package. The unit is set off by a band of collagen that holds it together. If you look under a microscope at a scalp, you can see follicular units growing in just this way. The doctor will discuss where your hair transplant procedure will take place. She may even have a nurse or helper give you a tour of the facility. It will most likely be a doctor's clinic or an outpatient surgery center. You will be made to feel as comfortable as possible. Unless you are one of a very tiny group, you will not have to stay in the hospital overnight. 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 price per graft goes down, but the amount of money you have to come up with soars. If there is even the slightest lack of coverage, it will be evident. Just imagine a very light-skinned person with jet-black hair. This person's hair follicles will stand out in a very obvious way. No one ever knows how hair transplant surgery will turn out until they see the results. All of the basic problems can be dealt with if a skilled surgeon is involved. It does not matter what kind of hat it is, as long as it is fairly loose-fitting so that it does not rub on your new hair transplant grafts. You should not have to put up with this for long. After a couple of weeks, you can replace the cap with sunscreen. It should have an SPF of at least 30. Having just the right amount of blood flow to the hair transplant sites will make a big difference in how fast they heal. Once the surgeon has made all the hair transplant incisions that lay out the design he has created, the specially trained surgical team steps in. They use his plan to accomplish his goals, and in turn the goals of the patient. The groundwork is done for them by the surgeon when he does his incisions.