Cystic Acne — What Causes It · How Long to Heal · Preventing Scars
Cystic acne is the type most likely to scar. Dr. Big explains the causes, how long it heals, correct treatment, and how to prevent scarring. Ratchathewi, near BTS.
Quick answer: Cystic acne is caused by androgen-driven oil, deep clogging, C. acnes bacteria and follicle rupture, forming large, deep lumps that take 4–8 weeks to settle and carry a very high scar risk. Don’t squeeze it — calm it with spot anti-inflammatories and a cold compress, and see a doctor early, as an intralesional steroid injection can settle a large cyst in 24–48 hours and help prevent scarring.
A patient once asked Dr. Big: “I’ve had a cyst on my jaw for 3 weeks, it won’t subside, spot creams don’t work — what do I do?”
He answered honestly — don’t wait, go to a clinic — because cystic acne doesn’t clear easily like small pimples, and every inflamed day damages the skin beneath → a near-100% chance of scarring.
This article explains: what cystic acne is, what causes it, how long it heals, how to treat it, and how to prevent permanent scars.
What is cystic acne — vs ordinary acne
Cystic acne (a “cyst”) is a large, deep, pus-filled lump, over 15mm, that hurts and lasts 4–8 weeks. Unlike surface pimples, it sits deep in the dermis — which is why creams can’t reach it and why it scars so readily.
| Feature | Ordinary pimple | Cystic acne |
|---|---|---|
| Size | Small | Large (>15mm) |
| Depth | Shallow | Deep (dermis) |
| Pain | Mild | Severe |
| Duration | 3–5 days | 4–8 weeks |
| Scar risk | Low | ~100% |
What causes cystic acne
- Hormones — androgen surges (period, stress) drive deep oil production
- Deep clogging — oil + dead cells trapped deep in the follicle
- Bacteria — C. acnes multiplies, triggering deep inflammation
- Follicle rupture — the wall breaks, spreading inflammation through the dermis
Triggers: dairy + sugar · stress + poor sleep · squeezing · oily skin + chronic clogging.
How long does cystic acne take to heal?
- Left alone (not squeezed): 4–8 weeks
- Squeezed/poked: can drag on 2–3 months and scar
Cystic acne won’t pop — there’s nothing to release, just deep inflammation · squeezing only destroys surrounding tissue.
How to treat cystic acne
Don’t do this
Don’t squeeze · don’t poke with a needle · don’t use toothpaste · don’t apply harsh products.
Do this
- Spot anti-inflammatory (Benzoyl Peroxide, Niacinamide, Centella)
- Cold compress 10 min × 2–3/day
- See a doctor if large and very painful
Best in-clinic option: intralesional steroid injection
A doctor injects anti-inflammatory medication directly into the cyst → it subsides in 24–48 hours · safer than squeezing · no scar.
The doctor may also give oral antibiotics or isotretinoin for severe chronic cases.
Preventing scars from cystic acne
- Treat early — inject to subside before it grows · 2. Never squeeze · 3. SPF50+ daily · 4. Reduce dairy + sugar · 5. Sleep + reduce stress · 6. If recurring → see a doctor.
Read more: How to treat inflammatory acne and Blind pimples treatment.
If it already scarred
Cystic acne is the top scar producer. Once scarred, treat with Subcision + MNRF + Laser — read Acne Scars: The Complete Guide.
Frequently asked questions
Q: How long does cystic acne last? A: 4–8 weeks if untreated · longer if squeezed · fastest with an injection (24–48 hours).
Q: Can I pop a cyst? A: No — there’s nothing to release · popping spreads inflammation and scars.
Q: Why do I get cysts before my period? A: Pre-period progesterone and androgen drive deep oil → deep inflammation.
Q: Does the injection leave a dent? A: With the right technique and dose (Triamcinolone 2.5 mg/ml), the risk is very low · too concentrated may cause temporary skin atrophy (usually resolves in 2–3 months).
Q: Where can I consult or get a cyst injected near BTS? A: At Clarity Clinic Ratchathewi, near BTS Ratchathewi (1-min walk), easy to reach from Siam, Phaya Thai, all of Bangkok — Dr. Big assesses and treats in person, free 30-min consult.
Summary
Cystic acne is treatable if you don’t squeeze and care for it correctly — most Clarity patients see a 60–80% improvement in 4–8 weeks. The key is “stop touching” and “treat before it grows.”
Contact:
- LINE: @clarityclinic — send a photo of your acne scars for Dr. Big to review
- Location: Spring Tower, B Floor · Ratchathewi, near BTS (Siam, Phaya Thai, all Bangkok)
- Free 30-minute consult with Dr. Big in person
- Price 5,000 baht/session including all main procedures · pay per session, no course packages
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