Cystic or nodular acne sits deeper than ordinary spots and is the type most likely to scar. Dr Sin Yong of IN Eternity Clinic on Orchard Road explains when to stop self-treating and what medical care involves.
WhatsApp to Enquire →Key facts ↓Cystic acne means deep, painful, inflamed lumps under the skin that can last for weeks. Because it often scars, see a doctor early: especially if lumps are frequent, leave marks or dents, or have not improved after two to three months of pharmacy products. Treatment is usually prescription medicine, with in-clinic support for inflammation and, later, for scars.
Ordinary acne starts in the follicle: dead skin cells and oil form a plug, bacteria multiply behind it, and inflammation produces a red papule or a pustule near the surface. In nodular or “cystic” acne the same process runs deeper. The follicle wall gives way inside the dermis, its contents spill into the surrounding tissue, and the body mounts a much larger inflammatory response. The result is a firm, tender lump, often a centimetre or more across, that may never come to a head.
Dermatologists usually call these nodules; true cysts, with their own lining, are less common. The distinction matters less than the depth. Lesions this deep take weeks to settle, often recur in the same areas along the jaw, chin, cheeks, chest and back, and leave behind dark marks, indented scars or, on the chest and shoulders, raised scars.
Nodular acne is common in teenagers but also appears for the first time in adults, particularly women in their twenties and thirties. In adult women it often follows a hormonal pattern along the lower face; see hormonal acne. Men tend to have more truncal involvement on the back and chest.
Waiting to see if deep acne settles is the decision that most often leads to scars that later need their own treatment. Studies of scar risk point to the same factors again and again: how severe the acne is, how long it has gone untreated, whether lesions are picked, and a family history of scarring. See a doctor if any of these apply:
You have deep, painful lumps, even a few, especially if they recur in the same places. Spots leave dents, raised marks or dark patches that last for months. Two to three months of pharmacy products such as benzoyl peroxide or salicylic acid have not made a clear difference. Acne is affecting your mood, confidence, work or social life; this is common and a valid reason to treat earlier.
Some situations need prompt medical review rather than a skin plan. Acne that appears suddenly and severely, with fever, joint pain or ulcerating lesions, needs same-week attention. Sudden adult-onset acne with irregular periods, new hair growth on the face or body, or scalp thinning should be checked for polycystic ovary syndrome or another hormonal cause. Acne that began after starting a new medicine, steroid or supplement should be discussed with the prescribing doctor.
“A deep, painful spot is not a skincare problem. The sooner it is treated medically, the less there is to repair later.”
A few simple steps reduce damage while a medical plan is arranged. Wash twice a day with a gentle cleanser, and use a benzoyl peroxide wash or gel on affected areas if your skin tolerates it, starting every other day. Use a light, non-comedogenic moisturiser so the skin barrier holds up, and a daily sunscreen, because inflamed skin darkens more easily in the sun. A clean, cold compress for a few minutes eases the throbbing of a painful nodule.
Some popular habits do more harm than good. Squeezing, needling or “draining” a deep lump at home ruptures it further into the skin. Toothpaste, lemon, alcohol and other home remedies irritate the surface without reaching the inflammation. Thick oils, heavy make-up and frequent product switching add congestion and irritation. Steroid creams bought without a prescription can calm redness briefly but cause a rebound rash and should not be used on acne. Write down what you have tried and for how long; it saves time at the consultation.
Nodular acne is treated from the inside as well as the outside, because the inflammation is too deep for creams alone. A simplified overview of the options, all decided case by case:
| Treatment | What it acts on | Time to judge it | Key caution |
|---|---|---|---|
| Topical retinoid with benzoyl peroxide | Blocked follicles, bacteria | 8–12 weeks | Dryness and stinging at first |
| Oral antibiotic (prescription) | Bacteria, inflammation | 6–12 weeks | Limited course to limit resistance |
| Hormonal treatment (prescription) | Androgen effect on oil glands | About 3 months | Women only; medical checks first |
| Oral isotretinoin (prescription) | Oil glands, all four drivers | Course of months | Monitoring; no pregnancy |
Topical treatment continues alongside oral medicine and afterwards to maintain control. Oral antibiotics are not used on their own for long periods, because resistance develops and acne returns when they stop. For women whose acne follows a hormonal pattern, hormonal options are discussed with the gynaecologist or GP where appropriate. When acne is severe, scarring, or keeps returning despite these steps, isotretinoin is usually considered.
Isotretinoin is a prescription medicine derived from vitamin A. It shrinks the oil glands, reduces sebum, normalises how follicle cells shed and lowers inflammation, so it acts on all four drivers of acne. For severe and scarring acne it is the most studied option, and many people stay clear for long periods after a course, though some need a second course.
It needs medical supervision. Dry lips, dry skin and dry eyes are almost universal, and nosebleeds, muscle aches and sun sensitivity are common. Blood tests check liver function and blood fats. It must not be taken in pregnancy because it causes serious birth defects, so women who could become pregnant use reliable contraception before, during and for a period after the course. Mood is monitored, and any low mood or unusual thoughts should be reported straight away. Dose and duration are individual.
People on isotretinoin often ask about lasers and peels. The 2017 consensus reviews found no good evidence for an automatic six to twelve month wait for most procedures, but fully ablative resurfacing and mechanical dermabrasion are still avoided during and soon after a course. See isotretinoin and procedures.
In-clinic treatment supports medical care; it does not replace it. A painful, isolated nodule before an important event can be injected with a small dose of dilute corticosteroid, a prescription medicine, which often settles it within a few days. The dose is kept low because too much can leave a temporary dip in the skin.
Light-based treatment can calm inflammation and redness while medicines take effect. At IN Eternity Clinic, the options include the 675 nm Shaonu Guang (少女光) laser and R2 Glow; see laser acne treatment. Blackheads and whiteheads around the nodules can be cleared with a Hydrafacial or a salicylic acid peel. Deep nodules themselves are never squeezed or extracted.
The most useful scar prevention is controlling nodular acne early. Once breakouts have settled, two different things may be left behind. Brown or red marks are pigment and dilated vessels; they fade over months, faster with sun protection and, if needed, laser. Indented or raised scars are structural and do not fade by themselves.
Indented scars are treated with a combination of subcision, TCA CROSS, RF microneedling and fractional CO2, chosen by scar type; see acne scar treatment. Scar work usually starts once acne is controlled, so new scars are not forming during the course. Raised scars on the chest and shoulders are flattened rather than resurfaced.
Dr Sin Yong examines the pattern and depth of the acne, asks about previous treatments, medicines, periods and family history, and checks for lookalikes such as fungal folliculitis or rosacea. Standard photographs are taken so progress can be judged fairly. You leave with a written plan covering skincare, any prescription medicine and its monitoring, and when in-clinic treatment or scar work fits in. The consultation fee is waived with any medical treatment.
Often, but not always. Androgens drive oil production in everyone, and in many adult women nodular acne follows a monthly pattern along the jaw and chin. Blood hormone levels are frequently normal, because the oil glands are reacting strongly to normal levels. Irregular periods, excess hair or scalp thinning are reasons to check for polycystic ovary syndrome.
No. Deep nodules have no easy route to the surface, and squeezing ruptures the follicle further into the dermis, prolonging inflammation and raising the risk of scars and dark marks. A cold compress can ease pain. If one lump is very painful or an event is coming, a doctor can inject it with a small dose of dilute corticosteroid.
Most medical treatments need eight to twelve weeks before they can be judged fairly, and topical treatments can cause dryness or a brief flare first. Isotretinoin is taken as a course over several months. A corticosteroid injection into a single nodule works within days but treats only that lesion, not the tendency to form new ones.
It is a well-studied prescription medicine that is safe for most people when properly supervised. Side effects such as dryness are common and expected. It must not be taken in pregnancy, so reliable contraception is essential for women who could conceive. Blood tests and mood are monitored during the course, and any concerns are reviewed promptly with your doctor.
It can, which is the main reason to treat it early. The risk rises with the depth and number of lesions, the time they go untreated, picking, and a family history of scarring. Dark marks usually fade over months. Indented and raised scars are structural and need treatment once acne is controlled.
A facial can clear blackheads and whiteheads and calm surface oil, but it cannot reach the deep inflammation of a nodule, and nodules should never be extracted. A facial can sit alongside medical treatment as support. If you have deep, painful lumps, see a doctor before booking a facial.
Cost depends on whether prescription medicine is needed and which, the blood tests and reviews that go with it, whether in-clinic treatment such as laser or nodule injections is added, and whether scars are treated later. Dr Sin Yong explains the plan and its cost after assessment. The consultation fee is waived with any medical treatment.
IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, Singapore 228210. By appointment with Medical Director Dr Sin Yong. Monday to Saturday, 11am to 8pm. WhatsApp or call +65 8815 3008.
These sources describe mechanisms and general evidence. They are not a promise of any individual result; suitability is decided at an in-person assessment.