Acne commonly affects the face, neck, back, and chest ... or plants like poison ivy. Boils are painful, red bumps caused by bacterial infections in hair follicles or oil glands.

“Seborrheic keratoses are skin-colored or brown, warty bumps that typically develop on the chest, back ... are typically painful and look like a cluster of blisters with a red base, and they ...

4. Boils A boil is an infection in your hair follicle that leads to a painful, red bump. "It commonly fills with pus and may rupture if it becomes large enough," Zeichner says. Boils generally ...