Among adults, acne problems are most common in women in their late 20s to 40s. But whatever the age, the process of acne development remains the same. Combined with this oil production is an increase in the cells that line the hair follicle. As these cells and oil mix, they plug the hair follicle, trapping bacteria beneath the skin. This trapped bacteria causes the skin to inflame and turn red, forming a pimple.
Hormonal influences can have a big impact on acne development.
Stress, which causes an increase in the release of androgens, may be the cause for periodic skin outbreaks. Haycox notes that in women, acne can also occur due to changes in hormone levels caused by the menstruation cycle, birth control pills or hormone replacement therapy. Contrary to popular belief, acne is not a result of a person's hygiene or diet. Nor is it caused by eating things like chocolate or nuts. A number of effective treatments for acne are available.