Body acne, often called “bacne” when it’s on the back, forms the same way facial acne does, and responds to many of the same treatments. The main differences are practical. It’s hard to reach your own back with a leave-on cream, and sweat, clothing and gear rub against the skin all day. For most people, the first step is a benzoyl peroxide wash left on for a few minutes, along with a few changes to reduce sweat and friction. Deep, painful or widespread body acne usually needs a prescription.
Before treating, it’s worth ruling out one common look-alike. If the bumps are itchy and all look the same, they may be fungal acne (Malassezia folliculitis), which needs a different approach.
Why acne appears on the back, chest and shoulders
Like facial acne, body acne starts when oil (sebum) and dead skin cells plug hair follicles, Cutibacterium acnes bacteria multiply inside, and inflammation follows. The upper back, chest and shoulders are rich in oil glands, so they’re common acne sites, especially in people who also break out on the face.
A few things make body acne more likely or worse:
- Hormones and genetics. These drive acne everywhere, including the body.
- Sweat and heat. Sweat trapped under clothing, especially if you stay in damp workout clothes, can aggravate breakouts.
- Friction and pressure. The AAD notes that anything that repeatedly rubs or presses on the skin, such as backpack straps, sports pads, helmets, bra straps, tight synthetic clothing or car seats on long drives, can trigger a form called acne mechanica.
- Skin and hair products. Heavy body lotions, oils and residue from hair conditioner or styling products may contribute on the back, neck and hairline.
- Certain medicines. The AAD lists corticosteroids, lithium and some hormone-containing medicines among those that can cause acne. Don’t stop a prescribed medicine on your own; ask the prescriber.
Rule out look-alikes first
| Condition | Clues | Usual approach |
|---|---|---|
| Acne | Mix of blackheads, whiteheads and pimples of different sizes; not usually itchy | Benzoyl peroxide, retinoids, prescriptions |
| Malassezia (fungal) folliculitis | Itchy, small, uniform bumps and pustules; no blackheads; worse in heat or after antibiotics | Antifungals |
| Keratosis pilaris | Rough, small, skin-colored or red bumps, mainly on the upper arms and thighs | Moisturizers and gentle exfoliants |
| Heat rash (miliaria) | Tiny bumps or blisters after sweating in heat; clears quickly when cool | Cooling down and loose clothing |
| Bacterial folliculitis | Pustules centered on hairs, sometimes after shaving or hot tubs | Clinician assessment |
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Step 1: Use a benzoyl peroxide wash, and leave it on
For red, inflamed pimples on the back, chest or shoulders, a benzoyl peroxide (BPO) wash is usually the first choice. BPO kills acne bacteria, and bacteria don’t develop resistance to it. The FDA’s acne monograph allows 2.5% to 10% in over-the-counter products.
The trick with a wash is contact time. The AAD says benzoyl peroxide works best on the back when left on for two to five minutes before rinsing. Small studies support this “short contact” approach: a 2012 study found a 9.8% BPO foam reduced acne bacteria on the back when applied briefly and rinsed off. A 2022 lab study found higher concentrations killed C. acnes faster than lower ones.
How to fit it into a shower:
- Apply the wash to your back, chest and shoulders at the start of your shower. A long-handled back brush or a soft cloth can help you reach.
- Leave it on while you wash your hair, shave or clean the rest of your body.
- Rinse thoroughly after two to five minutes, including the neck and hairline.
For product picks and more on contact time, see our guide to the best body wash for back and chest acne. 4. Use white towels and sheets if you can. BPO bleaches colored fabric, even from residue.
If 10% dries or irritates your skin, try a lower strength. Our benzoyl peroxide concentration guide compares the options, and our guide to choosing an acne body wash covers what to look for on the label.
Step 2: Add a leave-on product if needed
Washes are convenient, but leave-on treatments stay on the skin longer. Options for the body:
- Adapalene 0.1% gel, an over-the-counter retinoid, helps prevent clogged pores. Many people use it on acne-prone patches of the chest or shoulders. Treating a large area raises the chance of dryness, so start every other night and moisturize. The label says to avoid broken, sunburned or eczema-affected skin. See our adapalene gel guide.
- Salicylic acid (0.5–2%) in body sprays, lotions or washes can help with blackheads and whiteheads, and is often better tolerated. Its evidence is weaker for inflamed acne. Read more in our salicylic acid guide.
- Leave-on benzoyl peroxide can be used on reachable spots, but it’s more likely than a wash to bleach clothing and bedding.
Add one product at a time and give each at least a few weeks, so you can tell what’s helping and what’s irritating.
Step 3: Cut down on sweat and friction
These habits won’t treat acne on their own, but they remove common aggravating factors:
- Shower soon after exercise and change out of sweaty clothes. If you can’t shower right away, change clothes and rinse when you can.
- Choose loose, breathable clothing for workouts and hot weather.
- Reduce rubbing. Adjust backpack straps, wear a clean, soft layer under sports pads, and wash gear that touches your skin.
- Rinse hair products off your back. Rinse conditioner out fully, then wash your back and body afterward.
- Choose non-comedogenic body lotions and sunscreens for acne-prone areas.
- Don’t scrub. Rough loofahs and harsh scrubs can irritate inflamed skin and don’t clear follicles. The AAD advises against scrubbing acne-prone skin.
When body acne needs a prescription
Body acne is often more stubborn than facial acne, and moderate or severe cases usually need prescription treatment. The 2024 AAD guidelines describe options that include:
- prescription topical retinoids, some of which have been studied specifically on the chest and back;
- oral antibiotics such as doxycycline, used with benzoyl peroxide or a retinoid and for as short a time as possible;
- hormonal treatment (combined oral contraceptives or spironolactone) for some women;
- isotretinoin for severe, scarring or treatment-resistant acne. It is prescribed only under the FDA-required iPLEDGE program, with close monitoring.
Deep, painful nodules and cysts on the back and chest are prone to scarring, including raised (hypertrophic or keloid) scars, especially on the chest and shoulders. That’s a strong reason to get effective treatment early. Our guide to acne scars explains the types and options.
When to see a dermatologist
See a dermatologist or your doctor if:
- body acne is deep, painful, or widespread;
- it’s leaving scars or dark marks;
- about three months of consistent over-the-counter treatment hasn’t helped;
- your bumps are itchy and uniform, or got worse on antibiotics (possible fungal folliculitis);
- acne appeared suddenly, especially after starting a new medicine or supplement;
- you’re under 18, pregnant or breastfeeding and want to start treatment.
For a full step-by-step plan that covers the face and body, see how to get rid of acne. If you’re not sure what level of care you need, our acne treatment path quiz can suggest a next step.