I have rashes on my hands, It starts as a tiny blood clot, develops a wound, the brown part rips off and leaves behind a mark which itches and spreads?

Rash. There are many possibilities. The most likely is a fungal rash. Try OTC lotrimin (clotrimazole) twice a day for a week on the rash. If it does not improve or resolve, then have your rash looked at by your doctor or a dermatologist.