Many of the doctors who advertise there are simply trying to start up a practice in the field. They may have little or no experience. This is just a way to get names that you can check out. When you contact a hair restoration surgeon, ask to see a portfolio of patients' photos before and after hair transplant surgery. 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 idea of bringing this information into hair transplant procedures led to innovative surgical methods. The patient will go in for a check-up so that any problems can be corrected quickly. If that is not possible, at least plans can be made to correct them at a future time. The doctor will have done his job with the hair transplant procedure at this point. All that remains is periodic checkups. If the hair loss is extensive, there may be more procedures, but all the hair transplant surgeries will be done with the same amount of care. 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. Some doctors are even transplanting donor hair into areas where the patient still has hair. This is an interesting question, because one would think that looking in the mirror would be more a problem of people who have already had hair transplant surgery. Actually, quite the opposite is true. When people are concerned about balding, they spend much time looking into a mirror to double-check and re-comb their hair to make it look like it covers more of their heads. Uncontrolled high blood pressure would be a problem. If you are on anti-clotting medications such as Coumadin, you would have to stop taking them for awhile before having a hair transplant. People who have a history of excessive scarring might want to think twice about getting a hair transplant. Scars are usually a part of the procedure because the donor hair is taken from the back and sides of the scalp.