Is it possible to have mold grow on skin?

I shower with my watch on and never take it off, last week I took it off and there was something on my skin that looked like black mold. I know what mold is and deal with it in my job but on skin..Will this make me sick?|||The black was probably a chemical reaction between your watch and the chlorine in the water. Chlorine causes some metals like nickel (a common alloy) to breakdown. Should not make you sick but could cause skin irritation. Might be a good idea to take your watch off when you shower.