<human>:  Can you explain what causes acne?
<bot>: Acne is caused by a combination of factors, such as hormonal changes, genetics, and excess oil production. Hormones can cause an increase in oil production, leading to clogged pores and resulting in pimples, blackheads, whiteheads, and other types of acne. Genetics can also play a role, as acne can run in families. Finally, poor hygiene or using certain skin care products and cosmetics can lead to clogged pores, which in turn can contribute to acne.