Cystic Acne: Why It Scars, What Works, and When to Get Help

Cystic acne (more precisely, nodulocystic acne) is the most severe everyday form of acne: deep, painful, inflamed lumps under the skin that often leave permanent scars. It isn’t a DIY problem. Drugstore products don’t reach deep enough to clear it, and the sooner you see a dermatologist, the less scarring you’re likely to have. Prescription options include oral antibiotics with topicals, hormonal treatment for some women, steroid injections for individual lumps, and isotretinoin, which the 2024 AAD guideline strongly recommends for severe or scarring acne.

What is cystic acne?

DermNet describes nodulocystic acne as a severe form of acne on the face and upper trunk, made up of inflamed nodules and cysts that typically heal with scarring. It notes the lumps can be firm, fluctuant (squishy) or tender, and calls them pseudocysts: they aren’t true cysts with a lining, which is why many dermatologists prefer “nodular acne” or “nodulocystic acne”.

The American Academy of Dermatology (AAD) says nodules and cysts penetrate deep into the skin and often cause permanent acne scars when they heal. StatPearls classifies anyone with nodular inflammatory acne as having severe acne, regardless of how many spots they have. DermNet adds that nodulocystic acne is usually a condition of adolescence and early adult life and is seen most often in males, although adult women can get deep, painful spots too (see hormonal acne in adults).

If you’re unsure whether your spots are nodules or ordinary pimples, my overview of the types of acne walks through each lesion.

Why is cystic acne so likely to scar?

Depth and time. The inflammation sits deep in the skin, and the longer it goes untreated, the more damage it does. In a US study of 1,972 people seeing dermatologists for acne, 43% already had acne scars. The risk factors included acne severity, the time between acne starting and the first effective treatment, relapsing acne and being male. The authors concluded that treatment delay is a key modifiable risk factor for scarring.

DermNet warns that unless treated early and effectively, nodulocystic acne results in scarring, particularly on the torso, and that in darker skin, post-inflammatory hyperpigmentation (dark marks) and keloid scars are common complications. The AAD’s version is simple: the sooner you start treatment, the fewer permanent scars you’ll have. For telling scars apart from temporary marks, see acne scars vs dark spots.

Why won’t over-the-counter products clear it?

The AAD doesn’t mince words about severe acne: “You cannot clear it with acne treatment that you buy at the store.” Its advice is that you either wait it out or see a dermatologist, and waiting risks scars. Drugstore staples like benzoyl peroxide, salicylic acid and adapalene are aimed at clogged pores and milder spots; for nodules and cysts, the AAD says plainly that you’ll need a dermatologist’s help. Your dermatologist may still keep a topical in your routine alongside prescription treatment.

Squeezing or lancing a cyst yourself is a particularly bad idea. The AAD warns that popping pushes material deeper, which can cause more noticeable acne, pain, scarring and infection. Dermatologists can drain a large cyst safely in the office if needed. More on this in should you pop pimples?

How do dermatologists treat cystic acne?

The 2024 AAD guideline of care is the most relevant roadmap. Options a dermatologist may discuss include:

• Oral antibiotics plus topicals. The guideline strongly recommends oral doxycycline and advises limiting systemic antibiotic use and combining antibiotics with topical therapies. The AAD’s patient guidance says antibiotics with a topical medicine are often the first treatment for severe acne, and that improvement takes two to three months.
• Hormonal treatment for women. Combined oral contraceptives and spironolactone get conditional recommendations in the guideline, and the AAD says they can help women with severe acne.
• Steroid injections for individual lumps. Adding intralesional corticosteroid injections for larger lesions is a good practice statement in the guideline, and the AAD says an injection is one way to get rid of a painful cyst or nodule. The AAD’s guideline announcement frames injections as an option for more rapid relief of larger acne bumps, and DermNet notes injections after drainage can help persistent or large nodules.
• Incision and drainage. The AAD describes this as a procedure to drain a large, painful acne cyst or nodule that medicine cannot clear. It’s an in-office procedure, not a home one.
• Isotretinoin. The guideline strongly recommends oral isotretinoin for acne that is severe, causing psychosocial burden or scarring, or failing standard oral or topical therapy. DermNet says it should be started early to prevent scarring.

What does the evidence say about isotretinoin?

Isotretinoin is a vitamin A-derived oral medication. StatPearls explains that it shrinks the oil glands and cuts oil production, normalises how follicles shed skin cells, and reduces inflammation. The FDA describes its approved use as treating severe recalcitrant nodular acne. A course generally lasts about 4 to 5 months, and the AAD says about 85% of patients see permanent clearing after one course. Some people need a second course.

In the interest of honesty: formal trial evidence is thinner than isotretinoin’s reputation. A 2018 Cochrane review of 31 randomised trials (3,836 participants) found that isotretinoin may slightly improve physician-assessed acne severity. In three trials comparing it with antibiotics plus topicals (400 participants), there was no evidence it reduced inflamed lesion counts more, but that evidence was rated very low quality. Higher doses and continuous daily dosing did better than lower or intermittent regimens (low-quality evidence). The review calls for better trials; it doesn’t say isotretinoin doesn’t work, and the guideline still gives it a strong recommendation.

Isotretinoin safety and iPLEDGE

Pregnancy. This is the big one. The FDA states isotretinoin is highly teratogenic and can cause birth defects, miscarriage, premature birth and death in babies. In the US, every patient must go through iPLEDGE, the FDA’s risk-management program designed to prevent pregnancy exposure. StatPearls notes that people who can get pregnant must use two effective forms of birth control or abstain, and the AAD notes that pregnancy tests are required before and during treatment, with monthly visits. The FDA approved changes to iPLEDGE in February 2026 to reduce the paperwork burden (including removing the “19-day lockout”), with implementation scheduled for November 15, 2026.

Common side effects. According to the AAD, dry skin, chapped lips, dry and irritated eyes, and nosebleeds are common, and skin becomes more sun-sensitive. StatPearls says dry lips affect roughly 90% of patients. StatPearls lists baseline blood tests, including liver function and lipids, before treatment, with monitoring during the course.

Mood. The FDA says all patients should be watched closely for depression, suicidal thoughts, mood changes, psychosis or aggression. At the same time, StatPearls notes the link is controversial and recent meta-analyses haven’t shown an association, and the AAD points out that severe acne itself raises depression risk. Tell your prescriber and people close to you if your mood changes.

Practical rules. The AAD says not to wax during treatment or for six months after, and not to donate blood during treatment or for 30 days after your last dose. It also advises avoiding vitamin A supplements.

When is cystic acne an emergency?

Rarely, severe acne tips into something more serious. Acne fulminans is a rare, sudden, painful form with ulcerated, bleeding lesions that can come with fever, joint or bone pain; it mostly affects adolescent males and can be triggered by high-dose isotretinoin or raised testosterone, including anabolic steroid use. A Scottish NHS pathway lists acne fulminans as needing same-day referral. Acne conglobata is another rare, severe form with interconnecting nodules, abscesses and draining tracts that inevitably scars.

Frequently asked questions