Acne is caused by an interaction of various factors that affect the sebaceous glands in your skin. When sebum and dead skin cells build up in your pores, it can clog your pores. This in turn makes it easier for bacteria to colonize and multiply, creating areas of inflammation on the skin. The result: pimples appear. These additionally clog the pores, which is why a vicious circle is created. But be careful: these are not to be confused with ordinary razor bumps.
Important to know: Hormonal changes, especially during puberty or pregnancy, can result in increased sebum production, so that the glands clog more easily. There is also solid evidence that certain foods increase the risk of acne.