What is a common cause of acne?

Acne is primarily caused by the overproduction of sebum, an oily substance produced by sebaceous glands in the skin, which can lead to blocked pores. When pores become clogged with excess oil, dead skin cells, and, sometimes, bacteria, they can become inflamed, resulting in acne. This process is often exacerbated by hormonal changes, which can increase sebum production, particularly during puberty, menstruation, and even stress.

Other factors, such as the types of products used on the skin, genetics, and environmental factors can also play a role in acne formation, but the fundamental mechanism is the overproduction of sebum leading to blocked pores. This is why the understanding of acne treatment often revolves around managing oil production and keeping the pores clear.

While dry skin, allergic reactions, and excessive exfoliation can contribute to various skin issues, they are not the primary drivers of acne formation specifically. Dry skin typically results in a different set of concerns, while allergic reactions would lead to irritation rather than the characteristic lesions of acne. Excessive exfoliation can lead to skin irritation and sensitivity but does not directly cause the same mechanism of pore blockage as sebum overproduction.