Acne commonly affects the face, neck, back, and chest. Keratosis pilaris ... Boils are painful, red bumps caused by bacterial infections in hair follicles or oil glands. They often develop ...

Several weeks on, her situation worsened when her chest became red and blotchy ... the side of your neck). "A rash appears 12 to 48 hours later. It looks like small, raised bumps and starts ...