Acne causes pimples, usually on the face, chest, or back. Most common in teenagers and young adults, acne can also affect ...

Adult acne can range from mild to severe, with occasional blackheads and whiteheads to full-blown cysts and extreme irritation ... skin cells and then become infected, which results in swelling ...

These may include blackheads, whiteheads, or painful cysts. Acne commonly affects the face ... such as the neck or thighs. This viral infection causes small, firm, dome-shaped bumps with a ...