What causes body acne?

What causes acne on the body?

Oil glands sit beneath the skin and connect to hair follicles, the small openings where hairs grow. These glands make sebum, an oil that lubricates skin and hair. In acne, the glands produce too much sebum. The oil mixes with dead skin cells and forms a plug inside the follicle. Blocked follicles, excess oil, bacteria and inflammation are the four main processes involved in acne. Treatment can target more than one of these processes.34

Hormone changes during puberty, periods, menopause and pregnancy can contribute to acne. Certain medicines and products that make skin greasy can also cause breakouts. Acne usually affects the face, chest and back. On the body, loose, breathable clothing is a useful choice, especially during exercise or sweating. Sweat can irritate existing acne, so shower after exercise rather than staying in sweaty clothes.13

Persistent acne sometimes runs in families and can continue into adulthood. If acne starts suddenly in an adult woman alongside excessive body hair or irregular periods, arrange a medical assessment for a possible hormonal imbalance. Those symptoms can occur with polycystic ovary syndrome, usually called PCOS; acne alone does not tell you whether you have it.3

Are all body bumps acne?

No. Buttock bumps are more commonly folliculitis, keratosis pilaris or boils. Folliculitis means irritation of a hair follicle. Tight clothing, friction, shaving, waxing and infections can cause it. Folliculitis can look like a single pimple or a rash. Keratosis pilaris happens when keratin, a skin protein, builds up inside follicles, commonly on the arms, thighs and buttocks. Boils are a deeper form of folliculitis. Butt masks and butt polish exist, but a product category is not a diagnosis.2

Acne itself can include blackheads, whiteheads, raised bumps and spots filled with pus. Nodules and cysts are larger lumps beneath the skin that can be painful. A dermatologist looks at the types of bumps and their location to distinguish acne from conditions such as folliculitis. That distinction changes the treatment, particularly when the cause is an infection rather than a blocked pore.15

If the breakouts are on your scalp or hairline, consider hair products and headwear separately. Product buildup, oil, sweat and dead skin can block scalp follicles. Oily hair products and frequent hat or helmet use can increase the risk. For mild scalp breakouts, avoid greasy products or products that leave residue, wash your hair after sweating, and avoid tight headbands. Keep necessary helmets properly fitted and ventilated. Persistent scalp bumps need an assessment because scalp folliculitis and other conditions can resemble acne.6

How should you care for body acne?

1. 1Wash gently with a mild cleanser and lukewarm water. Avoid washing affected areas more than twice a day, and do not scrub.
2. 2After exercise, shower as soon as possible. If you cannot shower immediately, change out of sweaty clothes.
3. 3For a few blackheads, whiteheads or pimples, ask a pharmacist about an acne treatment such as benzoyl peroxide.
4. 4If skin becomes dry, use a fragrance free, water based moisturizer. Choose a noncomedogenic formula, meaning one less likely to block pores.
5. 5Leave spots alone. Picking or squeezing can worsen them and cause permanent scars.

Warm water, mild cleansers and gentle washing help care for skin without scrubbing. Moisturizer helps prevent dryness. These are general skin care measures, not a substitute for acne treatment when breakouts need medication.7

Which treatments address the cause?

Benzoyl peroxide comes in washes, gels and creams. Choose treatment for the type and severity of your breakouts rather than treating every body bump as the same problem.5

What if treatment irritates your skin?

Acne washes can dry skin, and some do not need daily use. Retinoids can also irritate skin. If a prescribed retinoid causes irritation, contact your dermatologist before changing the amount, frequency or application order. They can advise whether to use moisturizer first. Retinoids are often applied in the evening. Protect exposed skin with shade, clothing and noncomedogenic, water resistant sunscreen offering broad spectrum protection and SPF 30 or higher.25

Pregnancy and breastfeeding change which acne medicines are appropriate. Tell the prescriber before starting treatment: tetracycline antibiotics are generally not used during pregnancy or breastfeeding. Do not choose prescription treatment solely by what worked for someone else.3

How long does body acne take to improve?

Acne treatment usually takes at least six to eight weeks before you start seeing fewer breakouts. More severe acne can take two to three months to improve. Follow the treatment plan consistently. Once skin clears, maintenance treatment is often needed because acne can return quickly without it. Clearing existing spots and preventing new ones are separate jobs, which is inconvenient for products promising an overnight transformation.45

When should you see a doctor?

See a doctor if self treatment is not helping, you have many spots, or breakouts are deep, painful or leaving scars. Get medical advice for hot, swollen or red skin, which can signal infection; redness can be harder to see on brown and black skin. Acne affecting your mental health is also a reason to seek help.1

Severe acne with deep cysts or nodules needs prescription care rather than repeated trials of shop bought products. A dermatologist can combine medicines that reduce bacteria, blocked pores and inflammation. Options include oral antibiotics with treatment applied to the skin, or isotretinoin for severe acne. Isotretinoin requires careful consideration of side effects and a monitoring program. Treating severe acne can prevent new scars. Do not try to drain a painful cyst, nodule or boil yourself; a clinician can assess whether a procedure is needed.4