Hormones. Clogged pores. Bacteria. You probably know they all contribute to acne, but the truth is no one knows exactly what causes it. Most experts agree, though, that there are several related factors that may aggravate the condition, including:
Hormones: Acne can flare up easily in teens and adults—especially for women during pregnancy, menstrual periods and menopause.
Certain drugs: Avoid products like lithium and steroids. In fact, birth control pills may help keep acne from developing.
Genetics: If a parent, brother or sister, or your child has acne, it could be due to genetics. One study found that this was true of 50% of adults with acne.
Comedogenic products: Using oily skincare and some hair products can block pores which can lead to breakouts.
Stress: Stress won’t cause acne, but it can aggravate hormones that do. The higher the stress level, the higher the occurrence of acne.
Physical pressure: For some, the pressure from helmets, chinstraps and collars can aggravate acne.
Some occupations: Exposure to industrial products like oils used in metal cutting may produce acne.