Most people experience acne in their teens, and many outgrow it when they reach adulthood. However, acne can and does affect many adults as well.
Pimples form when excess oil and dead skin cells clog pores in your skin, trapping germs inside with them. When your body’s immune system finds the germs, it reacts by making the area red, swollen, and filled with pus to fight the germs off. If the infection becomes severe, it can become a cyst, meaning the pimple becomes large, deep, and painful. Schedule an appointment with a dermatologist immediately if you think you have a cyst.