Length of Hair and Miniaturization?

Hello, my question is this. Ive recently been take propecia but ive noticed my scalp gettin really itchy. Is that normal. One more question. If your hair is balding. Dont your hair folicules get smaller every time that they fall out. Because they get smaller they can only go to a certain length, then they just fall out again? Am i right, or would you be able to grow your hair out to a length u wanted without the hair falling out? Id hate to grow my hair and it all fall out.

There is a good point in your questions. When hair shows miniaturization and the hair shafts get thinner, the hair stops growing to its normal length. I suspect that the length it grows to will reflect the amount of miniaturization. The more miniaturization, the less the hair length. Many men with advanced miniaturization of the frontal hairs will notice that the hair does not grow at all. It may stay there for a few years, but eventually the hair that is not growing will fall out. The normal cycling of the hair is what is producing this problem. Hair that is not growing is not cycling into its sleep phase (telogen), and when it does go into a sleep phase, some of it may not grow back. The itchy complaint may be something that has to be evaulated by a doctor who understands skin problems. Too many possibilities to address over the internet.