Acne is a skin condition that occurs when hair follicles (regions where hair is born) are blocked by sebum and dead cells, and are colonized by bacteria that generate inflammation. Very frequent in the adolescence phase, acne may also appear on adult skin, most of the time associated with hormonal changes in this phase.

Acne can be caused by several reasons, including hormonal changes, genetic predispositions, high levels of stress, use of some specific medications, supplements and cosmetics with oily formulations and textures.

In addition, some habits, such as washing your face many times a day and consuming fatty foods can influence the appearance of pimples.

Risk factors
Hormonal changes in the body can cause or aggravate acne. Such changes are common:

In adolescents
Two to seven days before menstruation
In pregnant women
In people who use certain medications, including those containing corticosteroids, androgens or lithium.

Acne can be irritated or worsened by:

Touching your face a lot
Excessive sweating
Leaving your hair in contact with your skin, which can make your skin more oily
Work with oils and chemicals regularly
Athletes or bodybuilders who take anabolic steroids are also at risk of aggravating or developing acne.

Acne develops most often on the face, neck, chest, shoulders, or back and can vary from mild to severe.

Usually, acne causes only pimples and blackheads. Sometimes it can develop into cysts and nodules. Cystic lesions are pimples that are large and deep, often painful and that can leave scars on the skin.
Carnation: small open lesions (with the black speck out) or closed;
Pimples: known lesions with a yellowish or white tip;
Papules: small red bumps;
Pustules: small “blisters” with pus that can appear on the skin;
Nodules: abnormal growths on the skin or any tissue in the body, forming elevations;
Cysts: a kind of tissue bag, which can be filled with air, liquid, pus or other fluid.

As acne is linked to the excess production of fat on the skin and the action of bacteria, some measures that contain this set of factors help to prevent the problem.
Some habits help prevent acne, such as:
. Gently wash your skin every day;
. Avoid exposing your skin to oils;
. Wash your hair frequently;
. Avoid wearing synthetic fabric clothing.