Prevention & care

Acne: what it is and how treatments differ

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Acne is an inflammatory condition involving hair follicles and oil glands. Blocked follicles, skin oil, cells, and inflammation create several kinds of lesions. It affects teenagers and adults and can involve the face, chest, back, or shoulders.[1]

Blackheads, whiteheads, and inflamed lesions

Comedones are plugged follicles: whiteheads remain closed while blackheads are open. Papules and pustules are inflamed lesions, and deeper nodules can be more painful and damaging. Acne involves sebum, abnormal accumulation of cells, and inflammatory responses around the follicle. Blackheads are not simply evidence of dirty skin, so stronger scrubbing does not address the underlying process.[1]

Treatments target different parts of the process

NIAMS describes goals of healing current lesions, preventing new ones, and limiting scarring. Topical and oral medicines can address follicle plugging, oil production, bacteria, or inflammation. Skin irritation is a possible adverse effect of topical treatment. Severe or scarring acne can need professional assessment, and the choice of treatment changes with severity and individual circumstances. NIAMS also recognizes embarrassment and anxiety as effects of acne, extending its impact beyond the visible lesions.[2]

What dermatology guidance supports

AAD’s guideline summary includes benzoyl peroxide, topical retinoids, and several other topical medicines, alongside selected oral antibiotics, hormonal therapies, and isotretinoin. It favors combining mechanisms and limiting systemic antibiotic use, with benzoyl peroxide and other topical therapy when antibiotics are used. The presence of several options does not mean they are interchangeable or that more products used at once must work better.[3]

Why gentle, consistent care matters

AAD recommends gentle cleansing and avoiding harsh scrubbing, picking, and irritating products. Repeatedly switching treatments can irritate skin, and improvement may take weeks or months. Picking can increase scars and dark marks; ultraviolet exposure damages skin and may interact with treatment sensitivity. Daily care supports treatment but does not replace assessing severe or persistent acne.[4]

Clearing a breakout and preventing relapse are different treatment goals

Maintenance means continuing a selected treatment to reduce recurrence after acne improves. The UK National Institute for Health and Care Excellence says it is not needed for everyone, but may be considered when relapses are frequent. This is different from continuing antibiotics indefinitely: antibiotic courses need review, and non-antibiotic topical options can have a maintenance role. Ask what the plan is after clearance, which treatment has which purpose and what would prompt review. Improvement is a reason to clarify the plan with the prescriber, rather than independently extending an antibiotic course.[9]

A flat color mark and a change in skin shape are different outcomes

Acne can leave flat patches of altered color as inflammation settles. These are usually different from scars that change skin structure. Depressed scars include narrow ice-pick pits, wider boxcar depressions and shallower rolling contours; raised scars involve excess scar tissue. Color changes and structural scars may coexist. This distinction helps explain why a product marketed for dark marks may not address a pit or raised scar. A dermatologist can assess persistent changes and suitable options; a photograph or the word scar on a product is not enough to select a procedure.[10]

Evidence & uncertainty

Treatment evidence and suitability vary between products and severity levels. Professional guidance supports specific medicines and combinations; it does not establish that every skincare product, light device, or dietary claim works. Preventing scars and reducing distress are relevant outcomes alongside clearing lesions.[3][2]

Selected-source overview · Independent review pending

Published questions

Are blackheads caused by dirt?

Selected-source overview · Independent review pending. Read the evidence context.

NIAMS does not identify dirt as the cause. Acne develops through follicle blockage, oil, cells, and inflammation, rather than inadequate scrubbing.[1]

Evidence behind this answer

Acne: Types, Causes, and Risk Factors
agency explanation · Date not stated
Selected page text; cited sections · Follicle blockage; inflammatory process; lesion types; myths