Question

are formed when an overactive skin oil gland gets infected. hangnails cavities ingrown toenails pimples

Explanation:

Pimples form when overactive skin oil - glands (sebaceous glands) get infected. Hangnails are related to damaged skin around nails, cavities are in teeth, and ingrown toenails are about toenail problems, not infected oil - glands.

Answer:

Pimples