Why are these people in particular affected by acne?

Acne is a common skin condition that affects people of all ages, races, and genders. However, there are certain factors that can increase the risk of developing acne, including:

* Genetics: Acne can run in families, and people with a family history of the condition are more likely to develop it themselves.

* Hormones: Acne is often triggered by changes in hormone levels, which is why it is common during puberty. Women can also experience acne flares during pregnancy or menopause.

* Certain medications: Some medications, such as birth control pills, corticosteroids, and lithium, can cause acne as a side effect.

* Oily skin: People with oily skin are more likely to develop acne because oil can clog pores and lead to the formation of blackheads and whiteheads.

* Bacteria: The bacteria that live on the skin can also contribute to acne. These bacteria feed on sebum (the oil produced by the skin) and produce waste products that can irritate the skin and cause inflammation.

It is important to note that acne is not caused by poor hygiene. In fact, scrubbing the skin too hard can actually worsen acne. The best way to treat acne is to see a dermatologist, who can recommend a personalized treatment plan.