But we know how blemishes usually form, which gives us some options for treating them.

A blemish usually begins with blocked pores, which can be caused by increased sebum, the natural oil we produce. High testosterone levels, or being sensitive to testosterone, can cause the production of more natural oils.

This extra oil can block the pore, which is the opening in the skin where sebum normally flows out. Sebum and dead skin cells can build up behind the blockage to create a comedone (blackhead or whitehead).

The environment inside the blocked pore is airtight, providing an ideal home for bacteria called P. acnes, which thrive in airless conditions. These bacteria lead to the inflammation under the skin that causes the red, painful effects of blemishes.

Avoid adding extra oil to the skin by using non-greasy, non-comedogenic (non-pore-blocking) products which are fragrance free.

Try the La Roche-Posay Effaclar Anti-Blemish System