Acne is a common skin condition that affects most people at some point. It causes spots, oily skin and sometimes skin that's hot or painful to touch.

The severity of acne is often categorised as:

mild – mostly whiteheads and blackheads, with a few papules and pustules

moderate – more widespread whiteheads and blackheads, with many papules and pustules

severe – lots of large, painful papules, pustules, nodules or cysts; you might also have some scarring

For mild acne, you should speak to a pharmacist for advice. For moderate or severe acne, speak to a GP.

https://www.nhs.uk/conditions/acne/

Patient Information Leaflet - Acne