Definition
What is Back and chest acne?
Back and chest acne forms through the same mechanism as acne on the face: the oil glands in hair follicles produce too much sebum, dead cells clog the opening of the follicle, acne-associated bacteria multiply in this closed environment and inflammation begins. The back and chest are among the areas of the body richest in oil glands, which makes them especially vulnerable to the effects of hormones, sweat and friction. Blackheads, whiteheads, red inflamed bumps and deep, painful lumps can all appear together.
In men, truncal acne can be more frequent and more pronounced. Testosterone stimulates the oil glands, and the gym, hot work environments and synthetic T-shirts worn for hours create friction and clogging along with sweat. Things that put constant pressure on the skin, like a backpack, a seatbelt, a work vest or a sports jersey, can also trigger what's called 'mechanical acne'. And because your back is hard to see and hard to reach, acne often goes unnoticed until it has progressed, which also raises the risk of scarring.
Not every bump on your back is classic acne. Small, itchy bumps that all look alike, get worse with heat and sweating and don't respond to acne creams may be a yeast-related inflammation of the hair follicles. Unlike the rough bumps on the arms and legs, these bumps usually cluster on the chest and upper back. It's important to have a dermatologist tell them apart, because the approach is different.
Check yourself
How do you spot it?
- ✓Blackheads and whiteheads on the upper back, shoulders and center of the chest
- ✓Red, tender inflamed bumps and pus-filled pimples
- ✓Deep, hard and painful lumps (nodules)
- ✓Breakouts concentrated along backpack straps, belts or jersey edges
- ✓Brown-purple marks where pimples have healed
- ✓Pitted or raised scars, especially on the shoulders and chest
- ✓Small, itchy bumps of the same size (suggesting a yeast-related condition)
- ✓Noticeable flare-ups in hot weather and during periods of heavy sweating and training
Why it happens
Main causes
01
Hormones and testosterone
Male hormones enlarge the oil glands and increase sebum production. That's why truncal acne can start in puberty and last into your 20s; in some men it continues into their 30s as well.
02
Sweat and delayed showers
Sweat alone doesn't cause pimples, but when sweat mixes with sebum and dead cells and stays on your skin for hours, clogging becomes easier. Going home in a sweaty T-shirt after a workout is a classic trigger.
03
Friction and pressure (mechanical acne)
Backpacks, work vests, protective gear, seatbelts and tight T-shirts put constant pressure and friction on the skin. Hair follicles in these areas clog and become inflamed more easily.
04
Protein supplements and diet
Cases of acne appearing only on the trunk have been reported in young men using whey protein to build muscle quickly. A large meta-analysis found that consumption of milk and dairy products was associated with acne. This doesn't mean everyone needs to give up protein powder, but if you've noticed more breakouts since starting a supplement, it's worth talking to your dermatologist about it.
05
Anabolic steroids
Anabolic-androgenic steroids used in gym circles cause acne in about half of users and can trigger severe, scarring types of acne. Sudden, widespread back acne is an important warning sign in this respect.
06
The wrong products
Heavy body oils, oily hair products running down your back in the shower and heavy sunscreens can clog pores. Using shampoo and conditioner at the start of your shower and washing your back last is a simple but effective step.
In daily life
Triggers that cause flare-ups
Medical approach
Treatment options
01
Topical treatments and body washes
In guidelines, active ingredient groups such as benzoyl peroxide, topical retinoids and azelaic acid are at the core of acne treatment. For the large surface of the back, your dermatologist may recommend washes or foams containing these ingredients. Keep in mind that benzoyl peroxide can bleach colored towels and T-shirts.
02
Oral antibiotics
For moderate to severe inflammatory truncal acne, your doctor may prescribe oral antibiotics for a set period. To limit the development of resistance, guidelines recommend using these medications for a short time and always together with topical treatment.
03
Systemic retinoid treatment
For deep, scarring truncal acne or acne that doesn't respond to other treatments, your dermatologist may consider oral retinoid treatment. This treatment requires regular blood tests and close medical follow-up.
04
Evaluating yeast-related conditions separately
If itchy bumps of equal size suggest yeast-related follicle inflammation, your doctor may recommend antifungal shampoos or creams, or oral antifungal medication if needed. Classic acne treatments may not be enough for this condition.
05
Treating marks and scars
Once the acne is under control, clinical procedures like chemical peels, laser and microneedling can be considered for leftover marks and scars. These procedures are usually postponed while acne is still active.
Did you know? · Back and chest acne
61% · In a study of 965 acne patients, acne was found on the back in 61% and on the chest in 45%.
Step by step
Care routine for Back and chest acne
4 steps
- 01
A short, lukewarm shower
In your morning shower, wash your back and chest with a gentle, low-pH cleanser. If your doctor recommended a medicated wash, leave it on your skin for 1-2 minutes, then rinse.
- 02
Hair first, back last
Use shampoo and conditioner at the start of your shower and rinse; wash your back and chest last so no residue stays on your skin.
- 03
Light lotion
Apply a light, non-comedogenic, oil-free lotion with prebiotic ingredients only to areas that feel dry.
- 04
Cotton or breathable T-shirt
Instead of tight synthetic T-shirts that cling to your skin all day, choose loose-fitting cotton or technical fabrics that wick sweat away quickly.
Caution
What to avoid, and when to see a doctor?
Avoid these
- ✕Trying to 'clean' your back by scrubbing it with an exfoliating mitt or stiff brush
- ✕Drying out pimples with alcohol-based cologne or lotion
- ✕Sitting for hours in sweaty workout clothes
- ✕Popping pimples yourself or having someone else pop them
- ✕Heavy body oils and pore-clogging lotions
- ✕Supplements containing hormones or steroids without medical supervision
- ✕Using antibiotic creams alone for months
See a dermatologist
- →If you have deep, painful and swollen pimples
- →If pimples are leaving pitted or raised scars
- →If acne started suddenly and became severe, especially if linked to supplement or hormone use
- →If small itchy bumps don't respond to acne products
- →If there's no clear improvement after three months of regular care
- →If acne comes with fever, joint pain or fatigue
Common misconceptions
Myth or fact?
✕Common belief
Back acne comes from dirt; if I scrub harder, it'll go away.
✓Fact
Acne isn't caused by dirt but by a cycle of oil glands, clogging and inflammation. Harsh scrubbing irritates the skin and increases inflammation and the risk of scarring. Gentle washing and the right active ingredients are much more effective.
✕Common belief
The sun dries out back acne, so lots of sunbathing in summer is good.
✓Fact
The sun can give a short-lived 'drying' feeling, but it increases sweating, darkens marks and makes the skin more sensitive when combined with some acne treatments. Sun exposure is not a treatment for back acne.
✕Common belief
Every bump on your back is a pimple.
✓Fact
Small, itchy bumps of the same size may be yeast-related follicle inflammation and won't respond to classic acne products. When things look different, a dermatologist needs to tell them apart.
Popular searches
Most asked about Back and chest acne
Your questions
Frequently asked questions
01Does protein powder cause back acne?+
Not in every man, but it can be a trigger for some. Cases have been reported of young men developing acne only on the trunk after starting whey protein, and a link between dairy products and acne has also been shown. If you notice more breakouts after starting a supplement, you can talk to your dermatologist or dietitian about taking a break for a few weeks or switching to a different protein source.
02What should I do if I can't shower after working out?+
Take off your sweaty T-shirt as soon as possible and put on a clean, dry one. If you can, wipe your back and chest with a damp towel. What really matters is not leaving sweat and sebum on your skin for hours under a fabric that rubs against it.
03Do back acne scars go away?+
Brown-purple marks often fade on their own over a few months; protecting them from the sun speeds up the process. Pitted or raised scars, however, don't disappear on their own; once the acne is under control, your dermatologist may consider procedures like laser, peels or microneedling. The best approach is to treat active acne early and not pop pimples.
04Why won't the itchy bumps on my back go away?+
Small, similar-looking itchy bumps that get worse with heat may suggest a yeast-related inflammation of the hair follicles. In this case, classic acne products may not work; your doctor may recommend antifungal approaches. You need to see a dermatologist for an accurate diagnosis.
05What should I look for in a body wash for back acne?+
Soap-free, low-pH, non-comedogenic formulas without heavy fragrance are a good foundation. Cleansers with salicylic acid can help clear pores. If your doctor recommended a benzoyl peroxide wash, add that to your routine too, but since it can dry your skin, follow up with a light moisturizer.
Scientific basis
Sources
- 01Prevalence and severity of facial and truncal acne in a referral cohort.
Tan JK, Tang J, Fung K, Gupta AK, Thomas DR, et al. · J Drugs Dermatol · 2008
In 965 acne patients, acne was found on the face, chest and back in 92%, 45% and 61% respectively; truncal acne was present in more than half of patients.
- 02Truncal Acne: A Neglected Entity.
Del Rosso JQ, Stein-Gold L, Lynde C, Tanghetti E, Alexis AF · J Drugs Dermatol · 2019
A review emphasizing that truncal acne is often overlooked and undertreated, and that scarring and discoloration are common.
- 03Guidelines of care for the management of acne vulgaris.
Reynolds RV, Yeung H, Cheng CE, Cook-Bolden F, Desai SR, et al. · J Am Acad Dermatol · 2024 · doi:10.1016/j.jaad.2023.12.017
The American Academy of Dermatology's current guideline provided evidence-based recommendations for benzoyl peroxide, topical retinoids, systemic antibiotics and systemic retinoids.
- 04Cutibacterium acnes (Propionibacterium acnes) and acne vulgaris: a brief look at the latest updates.
Dréno B, Pécastaings S, Corvec S, Veraldi S, Khammari A, et al. · J Eur Acad Dermatol Venereol · 2018 · doi:10.1111/jdv.15043
A review summarizing that the problem in acne is less the presence of the bacterium than the dominance of certain subtypes and a disrupted skin microbiome balance.
- 05Abuse of anabolic-androgenic steroids and bodybuilding acne: an underestimated health problem.
Melnik B, Jansen T, Grabbe S · J Dtsch Dermatol Ges · 2007 · doi:10.1111/j.1610-0387.2007.06176.x
Acne was reported to develop in about 50% of anabolic-androgenic steroid users, and this was described as an important warning sign, especially in men aged 18-26.
- 06Acne located on the trunk, whey protein supplementation: Is there any association?
Cengiz FP, Cevirgen Cemil B, Emiroglu N, Gulsel Bahali A, Onsun N · Health Promot Perspect · 2017 · doi:10.15171/hpp.2017.19
Acne located only on the trunk was reported in 6 healthy young men using whey protein to build muscle quickly.
- 07Dairy Intake and Acne Vulgaris: A Systematic Review and Meta-Analysis of 78,529 Children, Adolescents, and Young Adults.
Juhl CR, Bergholdt HKM, Miller IM, Jemec GBE, Kanters JK, et al. · Nutrients · 2018 · doi:10.3390/nu10081049
A meta-analysis of 78,529 people found a significant association between consumption of milk and dairy products and acne.
- 08Malassezia (pityrosporum) folliculitis.
Rubenstein RM, Malerich SA · J Clin Aesthet Dermatol · 2014
A review explaining that yeast-related follicle inflammation, marked by itchy, equal-sized bumps on the trunk, is often mistaken for acne and requires an antifungal approach.
- 09Microbial odor profile of polyester and cotton clothes after a fitness session.
Callewaert C, De Maeseneire E, Kerckhof FM, Verliefde A, Van de Wiele T, Boon N · Appl Environ Microbiol · 2014 · doi:10.1128/AEM.01422-14
In T-shirts collected after a workout, polyester was shown to grow different bacteria than cotton and produce a stronger, more unpleasant odor.
- 10The role of topical probiotics in skin conditions: A systematic review of animal and human studies and implications for future therapies.
Knackstedt R, Knackstedt T, Gatherwright J · Exp Dermatol · 2020 · doi:10.1111/exd.14032
A systematic review reporting that probiotics applied to the skin show promise for supporting microbiome balance in some skin conditions, including acne.
