Hi I m 27 year old fit and health personal trainer, i weigh 15 stone and I am active, I have something called thoracic outlet syndrome and have had numerous clots a few operations and a lot of day patient procedures, on my last op they have prescribed me with 160ml of clexane per days and it s been about a month now and my hair is becoming noticably thinner and I have a few bald patches, my hair is short as it is , I m a male I should add. Is this due to the clexane