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. 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. When you shop for a hair transplant surgeon, you will find that different doctors give widely varying estimates of the number of grafts you will need. This can make you very uncertain about the wisdom of even getting a hair transplant. It helps to have a fair idea of what to expect. Unfortunately, there are hair transplant surgeons who do not take their position of respect seriously. Excessive drinking may be a problem due to anesthesia and medications you have to take in the course of having your hair transplant done, so you may be asked to refrain from drinking until your head has healed. You may even be told whether or not to take certain vitamins and medications. The doctor will discuss where your hair transplant procedure will take place. 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. They were not only unbecoming, they were also permanent. Improvements were made in hair transplant surgery in the 1980s. Mini-grafts were better, but they still had the appearance of plugs, albeit smaller plugs. These were made up of 5-8 hairs each. This size of plugs is still being used by some surgeons even today. When doctors do hair transplant surgery to replace eyebrows, they have to make sure that they put the hairs in so that they will point in the natural hair direction. For this, the surgeons use very fine gauge needles. 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.