Acne vulgaris is the most common skin condition in the UK, affecting up to 95% of teenagers and around 25% of adults. While often dismissed as a cosmetic nuisance, acne can cause significant physical scarring and profound psychological harm — including anxiety, depression, and social withdrawal. Around 3.5 million GP appointments are made for acne in England each year, and it is responsible for considerable loss of quality of life, particularly in adolescents and young adults. The good news is that acne is highly treatable, and the NHS offers an effective stepwise treatment pathway from topical creams through to oral antibiotics, hormonal therapies, and — for severe cases — isotretinoin (Roaccutane) via specialist dermatology.
What Causes Acne?
Acne develops when hair follicles (pores) become blocked by a combination of excess sebum (oil), dead skin cells, and bacteria. The key factors in acne development are:
- Excess sebum production — driven by androgens (male hormones present in both sexes); increases significantly at puberty
- Follicular hyperkeratinisation — abnormal shedding of skin cells inside the pore, causing a plug (comedone)
- Cutibacterium acnes (C. acnes) bacteria — naturally present on all skin; in clogged pores, it multiplies rapidly and triggers inflammation
- Inflammation — the immune response to C. acnes causes the redness, swelling, and pus of inflammatory acne
Acne Triggers and Contributing Factors
- Hormonal changes — puberty, menstrual cycle, pregnancy, PCOS, and menopause all affect sebum production
- Certain medications — corticosteroids, lithium, some anticonvulsants, anabolic steroids, and some progestogen-only contraceptives can worsen acne
- Diet — high-glycaemic index foods (white bread, sugary drinks) and dairy (particularly skimmed milk) have the strongest evidence for exacerbating acne; the link with chocolate is less clear
- Stress — stress hormones (cortisol) increase sebum production
- Comedogenic skincare or cosmetics — oil-based products that block pores
- Friction or pressure — helmets, headbands, or phone screens rubbing against skin (acne mechanica)
- Sweating — particularly in hot, humid environments or during intense exercise
Acne is not caused by poor hygiene, eating chocolate, or not washing your face enough. Overwashing and scrubbing can actually make acne worse by irritating the skin barrier.
Types and Grades of Acne
Non-Inflammatory Acne (Comedones)
- Blackheads (open comedones) — pores blocked with oxidised sebum; the dark colour is not dirt but oxidised melanin
- Whiteheads (closed comedones) — pores blocked beneath the skin surface; appear as small flesh-coloured or white bumps
Inflammatory Acne
- Papules — small, raised, red bumps caused by inflamed follicles
- Pustules — papules with a visible white or yellow pus-filled centre (not to be confused with milia)
- Nodules — large, solid, painful lumps deep within the skin; more likely to scar
- Cysts — the most severe form; large, painful, fluid-filled lumps that almost always cause scarring and require specialist treatment
Acne Severity Grading
- Mild acne — predominantly comedones with few inflammatory lesions; treated in primary care
- Moderate acne — mix of comedones and inflammatory lesions; may need oral antibiotics or hormonal treatment
- Severe acne — extensive inflammatory lesions, nodules, or cysts; GP should refer to NHS dermatology for consideration of isotretinoin
NHS Treatment for Acne: The Stepwise Approach
NICE guideline NG198 (2021) provides the definitive NHS treatment pathway for acne. Treatment should be continued for at least 6–8 weeks before assessing response, as acne treatments take time to work.
Step 1: Topical Treatments (First-Line for Mild-to-Moderate Acne)
- Topical retinoids — adapalene (Differin, available OTC 0.1% gel), tretinoin — prevent comedone formation and have anti-inflammatory properties. The cornerstone of acne treatment. Applied at night as they increase UV sensitivity.
- Topical benzoyl peroxide — antibacterial and comedolytic; available OTC (Panoxyl, Acnecide) and on prescription. Key advantage: does not cause antibiotic resistance. Can bleach fabrics.
- Topical antibiotics — clindamycin (Dalacin T) or erythromycin; must ALWAYS be combined with benzoyl peroxide to reduce antibiotic resistance development. Not used as monotherapy per NICE NG198.
- Fixed-dose combination products — Epiduo (adapalene + benzoyl peroxide) is particularly effective and NICE-recommended for moderate acne; reduces resistance risk.
- Azelaic acid — effective for inflammatory and post-inflammatory hyperpigmentation; good option for darker skin tones prone to hyperpigmentation; available as Finacea 15% gel on NHS prescription.
Step 2: Oral Antibiotics (For Moderate-to-Severe Inflammatory Acne)
- Lymecycline (tetracycline class) — NICE first-line oral antibiotic for acne; 408mg once daily. Better tolerated than older tetracyclines.
- Doxycycline — 100mg once daily; effective alternative. Increases photosensitivity — sun protection essential.
- Erythromycin — used when tetracyclines are contraindicated (e.g. pregnancy, under 12s)
NICE recommends oral antibiotics should always be combined with topical benzoyl peroxide or a topical retinoid, should not be used for more than 6 months without specialist review, and should not be prescribed as monotherapy due to resistance concerns. NICE also advises against using different topical and oral antibiotics simultaneously.
Step 3: Hormonal Treatments (for Women)
- Combined oral contraceptive pill (COCP) — particularly co-cyprindiol (Dianette/Clairette) which contains cyproterone acetate (an anti-androgen) and ethinylestradiol. Highly effective for acne in women. MHRA advisory: co-cyprindiol carries a higher VTE (blood clot) risk than standard COCPs and should be used for acne only when other treatments have failed; should be stopped 3–4 cycles after acne resolves.
- Spironolactone (off-label in UK) — an anti-androgen increasingly prescribed off-label by UK dermatologists for women with hormonal acne. Not licensed for acne in the UK but growing evidence base. Requires contraception as teratogenic.
Step 4: Isotretinoin (Roaccutane) for Severe Acne
Isotretinoin (brand name Roaccutane; also available as Rizuderm, Isosupra Lidose) is the most effective acne treatment available and the only treatment that can produce long-term remission or cure of severe acne. It works by dramatically reducing sebum production, shrinking sebaceous glands, preventing follicular blockage, and reducing C. acnes bacteria. Around 60–70% of patients are clear after one course, and many remain clear for years.
In the UK, isotretinoin is prescribed exclusively by NHS consultant dermatologists or specialist GPs with a shared care protocol. It cannot be prescribed by GPs alone. Isotretinoin requires strict monitoring and safety measures including:
- Pregnancy Prevention Programme (PPP) — teratogenicity is severe; all women of childbearing age must use two forms of contraception during treatment and for 1 month after
- Monthly blood monitoring — liver function tests and lipids (isotretinoin can raise triglycerides and cholesterol)
- Mental health monitoring — isotretinoin carries a medicines warning regarding depression and suicidal ideation; patients and families should be informed and any worsening of mood reported immediately (though the evidence for a causal link with depression remains controversial)
- Avoiding blood donation during treatment and for 1 month after
- Not taking vitamin A supplements (additive toxicity risk)
Acne Scarring: NHS Treatment Options
Acne scars are a significant concern for many patients. Types include ice pick scars (deep, narrow pits), boxcar scars (broad depressions), rolling scars (wavy skin surface), and hypertrophic/keloid scars (raised above skin level). Post-inflammatory hyperpigmentation (PIH) — dark marks left after spots heal — is not true scarring but is particularly problematic in darker skin tones.
NHS dermatology offers limited cosmetic scar treatments, as most are considered aesthetic rather than medical. Options available include: laser resurfacing (fractional CO2 or Er:YAG), chemical peels, microneedling, subcision, punch excision, and filler injections for atrophic scars. These are generally only available privately in the UK (costs £200–£3,000+ per session). NHS prescribing of topical treatments including retinoids and azelaic acid can improve PIH over time.
UK-Specific Considerations for Acne
Acne in Darker Skin Tones
Acne in Black, South Asian, and other darker skin tones requires specific consideration in the UK. Post-inflammatory hyperpigmentation (PIH) — the dark marks left after spots — is more pronounced, persistent, and distressing in darker skin. Azelaic acid (Finacea) is particularly beneficial as it treats both acne and PIH. Retinoids at full strength can initially worsen PIH — starting at lower concentrations and building up slowly is recommended. Keloid scarring is more common in darker skin. UK dermatologists with experience treating skin of colour are available in NHS Trusts in major cities; awareness of acne presentations in darker skin across the NHS remains an area for improvement.
Adult Female Acne: A Growing NHS Presentation
Adult acne in women — typically presenting on the lower face, jaw, and neck — is increasingly common and is frequently hormonal in origin, related to PCOS, menstrual cycle fluctuations, or coming off the combined pill. It is often undertreated because GPs may consider adult acne less urgent than teenage acne. Women with adult acne should ask their GP to screen for PCOS (blood androgens, LH, FSH, pelvic ultrasound) and consider whether hormonal treatments (COCP, spironolactone) might be more appropriate than repeated antibiotic courses.
UK Support Resources for Acne
- Acne Support (acnesupport.org.uk) — UK charity providing support, information, and a helpline for people affected by acne
- British Association of Dermatologists (bad.org.uk) — patient information leaflets on acne and treatment options
- NHS.uk acne information — clear NHS patient-facing guide to acne treatment options and when to see a GP
- NICE NG198 — the full NICE acne guideline, including prescribing recommendations and antibiotic stewardship principles
What Major Health Sites Often Miss About Acne
1. Antibiotic Resistance in Acne Is a Serious NHS Concern
Many patients are on oral antibiotics for acne for years — and many health sites fail to mention that NICE NG198 specifically limits oral antibiotics to 6 months without specialist review. C. acnes antibiotic resistance is a growing problem, meaning treatments that worked for previous generations are now less effective. The solution is always combining antibiotics with benzoyl peroxide, completing antibiotic courses, transitioning to non-antibiotic maintenance treatments (retinoids, benzoyl peroxide), and requesting isotretinoin referral if antibiotics are failing.
2. Adapalene Is Now Available Over the Counter in the UK
Since 2021, adapalene 0.1% gel (Differin) became available over the counter in UK pharmacies without prescription — a significant change that most articles published before 2021 miss. This makes a prescription-strength retinoid accessible to anyone aged 12 and over. Adapalene OTC is the single biggest advance in accessible acne treatment in recent years. Many patients spending money on ineffective OTC products could benefit enormously from OTC adapalene at a pharmacy.
3. Isotretinoin’s Mental Health Link Is More Complex Than Headlines Suggest
Isotretinoin (Roaccutane) carries a product licence warning about depression and suicidal ideation. However, the evidence for a direct causal link is not definitive — several large studies show that treating severe acne (which itself causes significant psychological distress) with isotretinoin actually improves mental health in most patients. Patients should be monitored for mood changes, but the psychiatric warning should not routinely prevent access to an effective treatment in appropriately selected patients. The decision should be made in discussion with a dermatologist weighing individual risk factors.
Related Health Guides on YourHealthXpert
Explore these related NHS-aligned health guides:
- PCOS Guide — PCOS is a major cause of hormonal acne in women; understand how treating PCOS with hormonal therapy and metformin improves skin as well as metabolic health.
- Eczema Guide — Eczema and acne both involve the skin barrier; learn how to manage both conditions with appropriate NHS skincare and treatment.
- Psoriasis Guide — Psoriasis is sometimes confused with acne on the scalp and face; understand the NHS diagnostic differences and treatment pathways.
- Anxiety & Depression Guide — Acne causes significant psychological distress including depression and social anxiety; understand the NHS mental health support available alongside skin treatment.
- HRT Guide — Hormonal changes during menopause can trigger adult acne; learn how HRT and other hormonal treatments affect skin health.
- Weight Loss Injections Guide — GLP-1 receptor agonists like semaglutide may reduce PCOS-related hormonal acne through insulin sensitisation; understand the emerging evidence.