How your pimple got there
Pimples happen when your pores are clogged with oil and dead skin cells. Dead skin cells are supposed to rise to the surface of your pores and flake off. When you produce too much oil, dead skin cells can get stuck together. These little globs of oil and skin form into a plug that blocks your pores.
Sometimes, bacteria that lives naturally on your skin get trapped behind these plugs. As the bacteria grow inside your pore, they cause the redness and inflammation that’s typical in pimples. Depending on the amount of inflammation and bacteria, your pimple may develop a whitehead or become cystic.
Pimples on the chin are very common. If you’ve heard about face mapping, then you may know that pimples on certain areas of your face may have different causes. Research suggests that acne on your chin and jawline is often related to hormonesTrusted Source, particularly in women.
Hormones called androgens stimulate the production of sebum, which is the oil responsible for clogging pores. Acne is very common among teenagers because hormone production increases during this time. But hormone levels fluctuate throughout adulthood.
Chin or jawline acne may fluctuate with your monthly periods. Some women produce more androgens than others. Increased androgen production can be the result of a condition like polycystic ovary syndrome (PCOS).