Nothing usually happens when you are on LT, but when you come off, there has been problems...My hair is still falling out, and has thinned a lot! Some people have suffered quite bad hair loss and in clumps as well.
I bought some special shampoo/conditioner, and something else, which I use once in a while just to help. It was rather expensive, and I will try and find what it is called.
If you google hair and LT, you might find some info....might be a bit scarey, but I just think it is a small price to pay, and it doesnt happen to everyone either!