Adult acne on the back: what helps and when to get treatment

Why am I getting back acne as an adult?

Acne starts when hair follicles, the openings where hair grows, become blocked with excess oil and dead skin cells. Bacteria can grow inside the blocked follicles and cause inflammation and pus. Acne is most common in teenagers, but adults can get it too. Hormonal changes, certain medicines, oily skin or hair products, sweat and humidity can trigger breakouts. Hormonal changes during periods, menopause and pregnancy can contribute. A new breakout does not identify its cause by itself.34

Which spots can I treat at home?

Home treatment is a reasonable starting point for blackheads, whiteheads and small pimples without deep pain or scarring. Whiteheads are small bumps the colour of your skin; blackheads are dark spots that can be flat or raised. Inflamed bumps can look pink or red on white skin and brown or purple on brown or black skin. Pustules contain pus. Nodules and cysts are larger lumps underneath the skin and can be painful. Do not wait through a home treatment trial for those deeper spots.23

Which acne ingredient should I choose?

Start with one active ingredient and follow its instructions instead of adding several treatments at once. For adult acne generally, 2.5% benzoyl peroxide is a starting strength intended to reduce irritation. For back specific foaming washes, 5.3% is an option with less irritation than stronger washes. A 10% wash is stronger, not the automatic starting choice. The strength and whether the product washes off or stays on both matter.25

How to apply treatment to your back

1. 1Before first using benzoyl peroxide, apply a small amount to one or two small treatment areas for three days. If there is no reaction or discomfort, proceed as directed.
2. 2Wash gently. For a benzoyl peroxide foaming back wash, two to five minutes of contact before rinsing can improve its action. Follow the particular product's directions.
3. 3Rinse the wash thoroughly. Keep benzoyl peroxide away from hair and coloured fabrics because it can bleach them.
4. 4For a cream or gel, gently pat the washed area dry and apply as instructed. Spread acne medication in a thin layer across the acne prone area, not only individual visible spots.
5. 5Start benzoyl peroxide once daily to check your skin's response. If adapalene is part of your treatment plan, back acne guidance places it after showering or before bed, daily.

A back lotion applicator or help from someone you trust can make hard to reach areas easier to treat, because skincare packaging tends to assume every body part is conveniently located.1

What should I change after exercise?

Wear loose cotton or sweat wicking workout clothes, then shower and change promptly after sweating. If a shower is unavailable, gently use an oil free cleansing wipe and change clothes. Wash workout clothes after each use, so yesterday's gym shirt does not get promoted to today's clean laundry. Reduce friction from backpacks or straps by choosing a bag that does not rub against your back.15

How do I avoid making my back more irritated?

Use a mild cleanser once or twice daily and after exercise, without repeated washing or scrubbing. Avoid drying alcohol based toners, greasy creams and harsh cleansing products. Choose a water based or noncomedogenic moisturizer if treatment makes your skin dry or peel. Noncomedogenic means formulated not to clog pores, but stop using any product that makes your breakouts worse. Do not squeeze, scratch or pick spots: doing so can cause infection, scarring and slower healing.4

Do not use tanning as acne treatment. When your back is exposed outdoors, use an oil free, noncomedogenic, broad spectrum, water resistant sunscreen with SPF 30 or higher. Sun exposure can darken acne marks, and some acne medicines increase sun sensitivity.45

What side effects mean I should stop?

Acne medicines can cause dryness, redness or peeling. For mild irritation, using smaller amounts or applying every other or third day can help while your skin adjusts. Tell your doctor if benzoyl peroxide causes severe or persistent dryness, peeling, warmth, tingling or stinging. Do not compensate for a missed dose by doubling the next one.46

Get immediate medical advice for burning, blistering, marked redness, swelling or a rash from benzoyl peroxide. Stop using it and get immediate medical help for hives, itching, throat tightness, breathing difficulty, faintness or swelling of the eyes, face, lips or tongue.6

If you are pregnant or trying to become pregnant, consult a dermatologist before starting acne treatment, including products sold without a prescription. Tell your doctor about breastfeeding and tell your pharmacist or doctor which medicines, vitamins and other products you use before starting benzoyl peroxide. Do not add other skin medicines to the treated area without checking the treatment instructions and your clinician's advice.26

How long should I wait for results?

Back acne treatment can start showing improvement in six to eight weeks, with clearing taking three to four months. Use treatment consistently as directed rather than switching products every few days. If there is no difference after six to eight weeks, arrange medical help. Seek help sooner if acne worsens, becomes painful or starts leaving scars.45

What can a doctor do for persistent back acne?

Widespread back acne or acne that does not clear with treatments applied to the skin can need tablets. Options include antibiotics such as doxycycline, a combined contraceptive pill when appropriate, or isotretinoin. A doctor checks which treatment is suitable; these are not interchangeable choices. Prescription creams, gels or lotions are another option. Get assessed for hot, swollen skin or suspected infection, and seek help if acne affects your mental health. You do not have to exhaust home treatments before booking an appointment.127