Adult Acne and Clindamycin: What Men Should Know

Acne After 25

Acne is often thought of as a teenage problem, but the American Academy of Dermatology is clear that adults get acne too, and some continue to have it well into their 30s, 40s, and even 50s. It is also possible to develop acne for the first time as an adult. The AAD's 2024 acne guideline notes that acne commonly affects adults as well as adolescents (Reynolds et al., 2024).

In men, adult acne often shows up on the jawline, cheeks, back, and chest. It can overlap with shaving irritation and razor bumps, which look similar but have different causes. Persistent breakouts can also leave dark marks; see dark spots and hyperpigmentation.

What Contributes

The AAD lists several contributors to adult acne:

• Stress. Researchers have found a relationship between stress and acne flares.
• Family history. Some people appear to have a genetic predisposition.
• Hair and skin products. Heavy moisturizers, hair products, and some sunscreens can clog pores. The AAD suggests looking for "non-comedogenic," "oil-free," or "won't clog pores" on labels.
• Medicines. Acne can be a side effect of some medications. The AAD advises not stopping a prescribed medicine on your own and asking the prescriber instead.
• Underlying conditions. Occasionally acne is a sign of another medical issue.

Sweat under helmets, hats, and gym gear, and friction from straps, can also aggravate breakouts on the forehead, back, and shoulders.

How Clindamycin Works

Clindamycin is an antibiotic in the lincosamide family. Applied to the skin, it reduces the bacteria involved in acne (Cutibacterium acnes) and decreases inflammation. The U.S. National Library of Medicine describes it as working by slowing or stopping the growth of bacteria that cause acne and by decreasing swelling. It comes as a gel, lotion, solution, foam, or pre-moistened pledget. Depending on the product, it is applied once or twice a day.

Because it targets bacteria and inflammation, clindamycin is mainly useful for red, inflamed pimples rather than blackheads and whiteheads alone. Retinoids such as tretinoin work on clogged pores, which is one reason the two are often used together. Topical antibiotics, benzoyl peroxide, and topical retinoids all receive strong recommendations in the AAD's guideline (Reynolds et al., 2024).

Why It Is Not Used Alone

Antibiotic resistance is the main reason clindamycin is prescribed as part of a combination. A systematic review in The Lancet Infectious Diseases reported that in many countries more than half of acne bacteria strains are resistant to topical macrolides, a related antibiotic class, and recommended that, ideally, benzoyl peroxide combined with a topical retinoid be used instead of a topical antibiotic to minimize resistance, and that antibiotics not be used alone (Walsh et al., 2016).

Guidelines agree. The AAD's guideline lists combining topical therapies with multiple mechanisms of action and limiting antibiotic use as good practice (Reynolds et al., 2024), and an international consensus group on acne management has issued practical guidance along the same lines (Thiboutot et al., 2018). The AAD's patient guidance explains that an antibiotic used alone can quickly lose its ability to fight acne, which is why other acne medicine is prescribed alongside it, and that antibiotics are used for the shortest time possible.

Using It Well

1. Wash with a gentle, non-abrasive cleanser using your fingertips, as the AAD recommends.
2. Apply a thin layer to the whole area prone to breakouts, not just individual spots, following your prescription label.
3. Use the other parts of your plan as directed. If you also use tretinoin, your clinician will tell you whether to apply them at different times of day.
4. Keep products away from the eyes, nose, and mouth, as the National Library of Medicine advises.
5. Be patient. The AAD notes it can take several weeks to a few months to see a difference.
6. Avoid harsh scrubs, astringents, and alcohol-based products, which the AAD says can make acne look worse.

Once skin is clear, maintenance usually shifts to non-antibiotic treatment, often a topical retinoid. The AAD notes that continuing the maintenance plan helps keep skin clear and reduces the need for stronger medicines.

Side Effects and Cautions

The National Library of Medicine lists common side effects such as dry or peeling skin, itching or burning, redness, oily skin, and new pimples. Rarely, topical clindamycin has been associated with serious diarrhea. Contact a clinician right away if you develop diarrhea, watery or bloody stools, or stomach cramps.

Tell your clinician if you have a history of inflammatory bowel disease or severe diarrhea with antibiotics, or if you are allergic to clindamycin or lincomycin; the National Library of Medicine notes these may make clindamycin unsuitable. Share all the skin products you use.

See a clinician in person for painful, deep nodules or cysts, acne that is scarring, or breakouts that do not improve after a few months of treatment. A licensed clinician decides whether clindamycin, tretinoin, or another approach is appropriate. For how tretinoin fits in, read tretinoin for men and the tretinoin purge.

Frequently Asked Questions

Is it normal for men to get acne in their 30s?

Yes. The American Academy of Dermatology notes some adults continue to get acne into their 30s, 40s, and 50s, and some develop it for the first time as adults.

Why can't clindamycin be used by itself?

Acne bacteria can become resistant to antibiotics. Guidelines recommend pairing topical antibiotics with benzoyl peroxide or a retinoid to reduce resistance (Walsh et al., 2016; Reynolds et al., 2024).

Can I use clindamycin and tretinoin together?

They are commonly used together because they work in different ways. A clinician will advise on timing and order to limit irritation.

How long is topical clindamycin used?

Antibiotics for acne are generally used for the shortest effective period, then replaced with a non-antibiotic maintenance plan, as the AAD describes. Your clinician sets the duration.