What are the possible causes of bumps appearing almost daily on my skin, they are red and scab
over, but take months to heal leaving scars under the skin. And also bumps that get sore
and don't heal, they scab up and/or get scally, sweating and humid weather make them worse. All of these bumps are on my buttocks, forearms, shoulders, chest, belly, and in my scalp. (some on my face) Very few from the theigh down, and very few on arm areas not exposed to the sun.