 [ Symptoms ] i have a brown blotch about 3 in circumference that appeared near my belly button and it is getting bigger any ideas  have a brown blotch by belly button size of a dollar coin appeared in the last 6 mos about the size of a quarter does not itch no fever not raised any ideas my concern is that it has gotten bigger and continues to do so i just want to know if there is reason to be concerned [ Disease ] go see a dermatologist to make sure it is not skin cancer