What are the causes of hand washing?

Well i am a obsessive hand washer and i mostly see that my hands go red and they look like 70 year old hand's scratch too if they are really red however there is a way to undo this what you do it take a tiny bit of water and ALOT cream on a tissue and you gently stroke your hand with it and after a few days it should go back to normal if not use alot of cream!