Acne & Breakouts
Understand why you break out, which ingredients actually work, and how to build a routine that clears skin without wrecking your moisture barrier.
What Is Acne?
Acne is an inflammatory skin condition that occurs when hair follicles become clogged with oil (sebum) and dead skin cells. It ranges from mild blackheads and whiteheads to painful cystic nodules that scar. Nearly 85% of people between ages 12 and 24 experience some form of acne, and adult acne is increasingly common — particularly in women due to hormonal fluctuations.
Acne isn't a hygiene problem. Over-cleansing, harsh scrubs, and alcohol-based toners often make it worse by stripping the skin's protective barrier, which triggers even more oil production. The key is treating the root causes — excess sebum, clogged pores, bacterial overgrowth (Cutibacterium acnes), and inflammation — with targeted actives while keeping the barrier healthy.
Root Causes of Acne
Excess Sebum Production — Overactive sebaceous glands produce too much oil, especially in the T-zone. Hormones (androgens) are the main driver — which is why acne flares during puberty, menstruation, and periods of stress.
Follicular Hyperkeratinization — Dead skin cells don't shed properly and instead stick together inside the pore, forming a plug. This creates the perfect anaerobic environment for bacteria to thrive.
Bacterial Overgrowth (C. acnes) — Cutibacterium acnes lives on everyone's skin, but in clogged pores it multiplies rapidly, triggering the immune response that causes redness, swelling, and pus.
Inflammation — The red, swollen, painful nature of acne is an inflammatory response. Even "non-inflammatory" comedones have low-grade inflammation happening beneath the surface.
Lifestyle & Diet — High-glycemic foods and dairy (especially skim milk) are linked to acne in multiple studies. Stress raises cortisol, which increases sebum. And pore-clogging cosmetics can trigger cosmetic acne.
Key Ingredients That Help Acne
Salicylic Acid (BHA)
The gold standard for unclogging pores. Salicylic acid is oil-soluble, meaning it penetrates into the pore lining to dissolve the oil-and-dead-skin plug that causes blackheads and whiteheads. Use at 2% concentration 2–3 times per week. Paula's Choice 2% BHA Liquid Exfoliant is the benchmark product. Avoid if you're allergic to aspirin.
Niacinamide (Vitamin B3)
Reduces sebum production, shrinks the appearance of pores, and calms inflammation. At 10% concentration it's one of the best-studied actives for oily, acne-prone skin. The Ordinary Niacinamide 10% + Zinc 1% is the entry point — affordable and effective. Niacinamide also strengthens the barrier, which is critical when you're using drying acne treatments.
Benzoyl Peroxide
Kills C. acnes bacteria directly by releasing free-radical oxygen into the pore. Available OTC at 2.5%, 5%, and 10% — but 2.5% is nearly as effective as 10% with far less irritation. Start with a 2.5% spot treatment or wash. Can bleach fabrics, so use a white pillowcase.
Retinoids (Adapalene / Retinol)
Adapalene (Differin) is the first OTC retinoid FDA-approved for acne — it normalizes skin cell turnover so dead cells don't clog pores. Retinol (like The Ordinary Retinol 0.5% in Squalane) is gentler and also helps over time. Both require consistent use for 12+ weeks. Start every other night and buffer with moisturizer if dry.
Azelaic Acid
A multitasker: antibacterial, anti-inflammatory, and it fades post-acne marks. Azelaic acid at 10% (The Ordinary Azelaic Acid Suspension 10%) reduces both active breakouts and the hyperpigmentation they leave behind. It's gentle enough for sensitive skin and safe during pregnancy — a rare combination for an active.
Centella Asiatica (Cica)
Not an acne treatment per se, but centella is the best post-acne soother. It accelerates wound healing, reduces inflammation, and helps repair the compromised barrier that harsh acne actives can cause. Purito Centella Green Level Recovery Cream and Skin1004 Centella Ampoule are K-beauty favorites for calming breakout-ravaged skin.
Building an Acne Routine
Morning
- Gentle cleanser — COSRX Low pH Good Morning Gel Cleanser or Vanicream Gentle Facial Cleanser. No scrubs.
- BHA exfoliant (2–3×/week) — Paula's Choice 2% BHA Liquid Exfoliant. Wait 5 minutes.
- Niacinamide serum — The Ordinary Niacinamide 10% + Zinc 1%.
- Lightweight moisturizer — CeraVe PM Facial Moisturizing Lotion (has niacinamide + ceramides).
- Sunscreen SPF 30+ — Beauty of Joseon Relief Sun Rice + Probiotics. Non-negotiable — BHA and retinoids increase sun sensitivity.
Evening
- Oil cleanser — DHC Deep Cleansing Oil or Banila Co Clean It Zero. Dissolves sunscreen and sebum without stripping.
- Gentle cleanser — Same as morning. Double cleansing is key for acne-prone skin.
- Treatment — Alternate nights: Adapalene/Differin gel one night, azelaic acid the next. Don't stack both.
- Soothing serum — COSRX Snail Mucin or Skin1004 Centella Ampoule for barrier repair.
- Moisturizer — Etude SoonJung 2x Barrier Intensive Cream or La Roche-Posay Cicaplast Baume B5 on active spots.
Product Picks for Acne
| Product | Key Active | Best For | Shop |
|---|---|---|---|
| Paula's Choice 2% BHA Liquid Exfoliant | Salicylic Acid | Unclogging pores | Shop → |
| The Ordinary Niacinamide 10% + Zinc 1% | Niacinamide | Oil & pore control | Shop → |
| The Ordinary Azelaic Acid Suspension 10% | Azelaic Acid | Breakouts + marks | Shop → |
| Skin1004 Centella Ampoule | Centella | Soothing + repair | Shop → |
| CeraVe PM Facial Moisturizing Lotion | Niacinamide + Ceramides | Lightweight moisture | Shop → |
| Beauty of Joseon Relief Sun Rice + Probiotics | SPF 50+ | Non-greasy sun protection | Shop → |
* Some links are affiliate links — we earn a small commission at no cost to you.
Acne FAQ
Can I use BHA and retinol together?
It depends on your skin's tolerance. For most people, using BHA in the morning and retinol at night is the safest approach. If you want to layer them in the same routine, apply BHA first, wait 20–30 minutes, then apply retinol. If you experience peeling, burning, or increased breakouts, separate them to alternate nights. Beginners should never start both at the same time — introduce one, wait 2–3 weeks, then add the other.
Does niacinamide cause purging?
No. Niacinamide is not an exfoliant — it doesn't increase cell turnover, so it cannot cause purging. If you break out after starting niacinamide, it's likely a breakout from the product's base formula (some people react to the zinc in The Ordinary's version), or it's coincidental. Purging only happens with actives that increase cell turnover: AHAs, BHAs, and retinoids.
How do I know if my acne is hormonal?
Hormonal acne typically appears along the jawline, chin, and lower cheeks. It flares cyclically — before your period, during ovulation, or when starting/stopping birth control. The lesions tend to be deep, tender cysts rather than surface whiteheads. If your acne follows this pattern, topical treatments alone may not be enough. See a dermatologist about spironolactone, hormonal birth control, or prescription retinoids.
Should I moisturize if my skin is oily and acne-prone?
Absolutely, yes. Skipping moisturizer makes oily skin produce even more oil to compensate for dehydration. The key is choosing the right texture — lightweight gel-creams and lotions (not heavy creams). CeraVe PM Lotion, COSRX Hydrium Watery Gel Cream, and Illiyoon Ceramide Ato Concentrate Cream are all excellent options that hydrate without clogging pores. Look for "non-comedogenic" on the label.
When should I see a dermatologist for acne?
If your acne is nodular or cystic, leaving scars, not responding to 12+ weeks of OTC treatment, or significantly affecting your mental health, it's time to see a professional. Dermatologists have access to prescription-strength retinoids (tretinoin, adapalene), oral antibiotics, spironolactone, and isotretinoin (Accutane) — tools that OTC skincare simply cannot match. There's no shame in getting help; early treatment prevents permanent scarring.