Guide · Fungal acne
Fungal acne treatment itchy, same-sized bumps, why acne products miss them, and what clears them
Fungal acne is not really acne. It is a yeast overgrowth in the hair follicles that thrives in heat and sweat, and it often gets worse with acne treatment. Here is how to recognise it, how a doctor confirms it, and which antifungal washes, creams and tablets clear it.
Quick answer
- Fungal acne treatment means antifungal treatment, because fungal acne is not true acne but Malassezia folliculitis: an overgrowth of a yeast that normally lives on the skin, inside the hair follicles. It typically shows as itchy, same-sized 1 to 2 mm bumps and pustules on the forehead and hairline, chest, upper back and shoulders, without blackheads.
- Heat, humidity, sweat, tight clothing and recent antibiotics or steroid creams encourage it, so it is common in climates like Singapore's. In a study of 320 people diagnosed with acne in Bangkok, 28.8% had Malassezia folliculitis on microscopy, most of them alongside ordinary acne.
- Doctors treat it with antifungal washes such as ketoconazole or selenium sulfide, antifungal creams and, for widespread or stubborn cases, oral antifungals such as itraconazole or fluconazole. Most people respond well once it is correctly diagnosed, but relapse is common, so a maintenance wash is often advised.
- Get the diagnosis confirmed before self-treating, and see a GP or dermatologist if the bumps spread, hurt or keep returning. Dr Sin Yong confirms and treats it at IN Eternity Clinic, priced at consultation; SkinRev Lab does not diagnose, prescribe or inject.
The basics
What is fungal acne?
Fungal acne is the popular name for Malassezia folliculitis, also called Pityrosporum folliculitis. Malassezia are yeasts that are a normal part of the skin's flora and depend on skin oils to grow. When they multiply inside the hair follicles, the follicles become inflamed and itchy, producing small bumps that look like acne.
It is not caused by poor hygiene, and it is not true acne. Acne starts with a plug of oil and dead skin in the pore, which is why it has blackheads and whiteheads; fungal acne does not. The distinction matters because acne treatments, especially oral antibiotics, do not clear the yeast, and a review notes the condition can persist for years when it is treated only as acne.
Fungal acne often sits alongside ordinary acne. In a study of 320 new acne patients in Bangkok, 24.7% had both on microscopy and 4.1% had Malassezia folliculitis alone.
Side by side
Fungal acne vs acne: how to tell them apart
These are typical patterns rather than rules, and both can be present at once. A doctor confirms which you have.
| Fungal acne (Malassezia folliculitis) | Acne | |
|---|---|---|
| Bumps | Small, same-sized (about 1 to 2 mm) red bumps and pustules | Mixed sizes: blackheads, whiteheads, red bumps, pus spots, sometimes deep lumps |
| Itch | Common | Uncommon; spots tend to be tender rather than itchy |
| Blackheads and whiteheads | Absent | Usually present |
| Where | Forehead and hairline, chest, upper back, shoulders, upper arms | Face, jaw, chest and back |
| Triggers | Heat, sweat, occlusive clothing, recent antibiotics or steroids | Hormones, oil production, blocked pores |
| Response to antibiotics | Little or none; may appear after a course | Often improves |
| Main treatment | Antifungal washes, creams or tablets | Retinoids, benzoyl peroxide, antibiotics, hormonal treatment, isotretinoin |
Singapore climate
Why fungal acne is common in Singapore
Malassezia thrive in warmth and moisture. Studies from tropical Asia show how common the problem is: the Bangkok figure of 28.8% came from patients seen in the rainy season, and a review of 353 cases across seven Indonesian hospitals found itch in 84% and bumps mainly on the chest, back and shoulders. Singapore's year-round heat and humidity create similar conditions.
Antibiotics are another common trigger. In a US review of 110 young patients, more than 75% had recently been treated with antibiotics for acne, and the bumps clustered along the hairline and upper back. Antibiotics change the skin's normal flora, which can favour the yeast.
- Sweat that sits on the skin after exercise or a commute
- Tight, synthetic sportswear, backpacks and helmet straps
- Heavy, oily body creams and hair products along the hairline
- Courses of oral antibiotics, often given for presumed acne
- Steroid creams or tablets, and conditions or medicines that lower immunity
Diagnosis
How a doctor confirms fungal acne
The diagnosis starts with the look and the history: uniform itchy bumps, no blackheads, flares after sweating or antibiotics, and little response to acne products. Because the pattern overlaps with acne and with bacterial folliculitis, doctors often confirm it with a quick test, examining a pustule or skin scraping under the microscope after a potassium hydroxide (KOH) preparation or a stain to look for clusters of yeast spores. A Wood's lamp or dermoscopy can add clues.
Confirming it matters. A European expert group recommends positive findings before treatment is started. If antifungals are used for ordinary acne, the real problem goes untreated; if only acne treatment is used for fungal acne, it can drag on for months or years.
Treatment
Fungal acne treatment: washes, creams and tablets
Treatment targets the yeast. A review of 15 studies in people with normal immunity found success rates of 92% with oral antifungals and 81.6% with topical antifungals, once the diagnosis was right. Oral treatment tends to work faster: in a Japanese study cited by a 2025 review, the bumps flattened after an average of about two weeks on oral itraconazole and about four weeks on ketoconazole cream. If acne is also present, acne treatment is combined with the antifungal.
The oral antifungals used for fungal acne are prescribed by a doctor, who checks for liver problems and interactions with other medicines first. Some antifungal shampoos are sold in pharmacies, but confirm the diagnosis first and keep them away from the eyes.
| Option (generic name) | How it is used | Notes |
|---|---|---|
| Antifungal wash (ketoconazole or selenium sulfide shampoo) | Lathered onto affected skin, left for a few minutes, then rinsed, as directed | A common first step; also used to prevent relapse; can dry or irritate |
| Antifungal cream (ketoconazole and other azoles) | Applied to affected areas, usually for several weeks | Slower than tablets; variable results in studies |
| Oral antifungal (itraconazole, fluconazole) | A short course prescribed by a doctor | For widespread, stubborn or recurrent cases; not for everyone |
| Maintenance | Intermittent antifungal wash, plus avoiding triggers | Relapse is common without it |
| Acne treatment | Added when ordinary acne is also present | Treats the acne; does not clear the yeast |
Skincare
Skincare for fungal acne: what to avoid and what helps
Malassezia depend on fats to grow, which is why many doctors suggest keeping heavy oils, butters and rich, occlusive creams off affected areas. Online lists of 'fungal-acne-safe' ingredients go much further, but they are not based on clinical trials, so treat them as a rough guide rather than rules.
- Use a light, oil-free gel or lotion moisturiser on affected areas.
- Keep oily hair products and heavy pomades away from the hairline and forehead.
- Use a light, non-greasy sunscreen every day.
- Avoid steroid creams unless a doctor has prescribed them for a set time; they can mask the bumps and lead to a flare when stopped.
- Do not scrub the bumps; friction and irritation add to the inflammation.
- Shower soon after sweating, change out of damp clothes, and choose loose, breathable fabrics.
Relapse
Why fungal acne comes back, and how to prevent it
Malassezia are part of normal skin, so treatment reduces them rather than removing them, and the bumps often return when the conditions that favoured them return. Reviews describe a chronic, relapsing course. In one series cited by a 2025 review, about a quarter of people who cleared had a recurrence, typically within four months, while the rest stayed clear at six months using a maintenance antifungal shampoo.
No studies have compared maintenance strategies directly, but intermittent antifungal washes, managing sweat and occlusion, and avoiding unnecessary antibiotics are the usual advice. In Singapore's climate, a doctor may suggest continuing an antifungal wash once a week or so, especially during periods of heavy sweating.
Doctor first
When to see a GP or dermatologist
Fungal acne is a medical skin condition, and SkinRev Lab does not treat it. Mild cases may settle with an antifungal wash, but see a GP or dermatologist if any of the following apply.
- You are not sure it is fungal acne, or it has not improved after two to four weeks of an antifungal wash.
- The bumps are spreading, painful, larger than usual or filled with pus.
- You feel unwell or have a fever.
- It keeps coming back after treatment.
- You take steroids or other medicines that lower immunity, or have a condition affecting your immune system.
- You are pregnant or breastfeeding, or have liver problems, before taking any oral antifungal.
- There is also red, flaky skin on the face or scalp, which may be seborrhoeic dermatitis.
Where to go
Fungal acne care in our network
At IN Eternity Clinic, 9 Scotts Road, #12-01 Pacific Plaza, beside Orchard MRT, Dr Sin Yong examines the pattern of bumps, separates fungal acne from acne and other types of folliculitis, and, when appropriate after a consultation, prescribes treatment aimed at the yeast. If both conditions are present, the plan addresses each. Treatment is priced at consultation by the clinic; WhatsApp +65 8815 3008.
SkinRev Lab, at CityLink Mall #B1-28 by City Hall MRT, does not diagnose skin conditions, prescribe or inject, and its facials are not a treatment for fungal acne. For itchy, uniform bumps that may be fungal acne, the team will suggest seeing a doctor first, and HydraFacial is not the first step.
Sources
References & sources
- Rubenstein RM, Malerich SA. Malassezia (pityrosporum) folliculitis. J Clin Aesthet Dermatol. 2014;7(3):37-41.
- Prindaville B, Belazarian L, Levin NA, Wiss K. Pityrosporum folliculitis: a retrospective review of 110 cases. J Am Acad Dermatol. 2018;78(3):511-514.
- Paichitrojjana A, Chalermchai T. The prevalence, associated factors, and clinical characterization of Malassezia folliculitis in patients clinically diagnosed with acne vulgaris. Clin Cosmet Investig Dermatol. 2022;15:2647-2654.
- Niode NJ, Suling PL, Adji A, et al. Clinico-laboratory findings of Malassezia folliculitis in Indonesia: a multicentre study. Mycoses. 2022;65(10):953-959.
- Green M, Feschuk AM, Kashetsky N, Maibach HI. Clinical characteristics and treatment outcomes of Pityrosporum folliculitis in immunocompetent patients. Arch Dermatol Res. 2023;315(6):1497-1509.
- Henning MAS, Hay R, Rodriguez-Cerdeira C, et al. Position statement: recommendations on the diagnosis and treatment of Malassezia folliculitis. J Eur Acad Dermatol Venereol. 2023;37(7):1268-1275.
- Chalupczak NV, Lipner SR. Malassezia folliculitis: an underdiagnosed mimicker of acneiform eruptions. J Fungi (Basel). 2025;11(9):662.
Common questions
Your questions,
answered
How do I know if I have fungal acne?
Clues are small, itchy bumps that all look the same size, on the forehead, hairline, chest, back or shoulders, with no blackheads, often flaring after sweating or a course of antibiotics and not improving with acne products. A doctor can confirm it by looking at a sample under the microscope.
How long does fungal acne take to clear with treatment?
Often a few weeks. In one study, bumps flattened after about two weeks on an oral antifungal and about four weeks on an antifungal cream. Without the right treatment it can persist for months or years, and it often returns unless triggers are managed.
Can I use ketoconazole shampoo on my face for fungal acne?
Antifungal shampoos such as ketoconazole or selenium sulfide are commonly used as a short-contact wash on affected skin and then rinsed off. They can dry or irritate the face, so check the diagnosis and the routine with a doctor or pharmacist first, and keep them out of your eyes.
Does fungal acne go away on its own?
Sometimes it eases when triggers such as heavy sweating or antibiotics stop, but in a hot, humid climate it often persists or returns. Acne treatments and antibiotics do not clear it, so antifungal treatment is usually needed.
Is fungal acne contagious?
No. Malassezia yeast is a normal part of the skin's flora. Fungal acne happens when the yeast overgrows in your own follicles because of heat, sweat, occlusion, antibiotics or lowered immunity, not because you caught it from someone.
Why did my acne get worse after antibiotics?
One possibility is fungal acne. Oral antibiotics act on bacteria, not yeast, and in a review of 110 young patients with fungal acne, more than 75% had recently had antibiotics for acne. If itchy, uniform bumps appeared during or after a course, ask your doctor to check.
Can fungal acne and normal acne happen together?
Yes, often. In a Bangkok study, about a quarter of people diagnosed with acne also had fungal acne on microscopy. When both are present, the doctor treats each one.
What skincare should I avoid with fungal acne?
Heavy oils, butters and rich, occlusive creams on affected areas, oily hair products along the hairline, scrubs, and steroid creams unless prescribed. Choose light, oil-free moisturisers and sunscreen. Ingredient lists online are not based on clinical trials.
How much does fungal acne treatment cost in Singapore?
Antifungal washes are widely available in pharmacies, but the diagnosis is worth confirming first. At IN Eternity Clinic, Dr Sin Yong's assessment and treatment are priced at consultation, depending on the extent and whether oral medicine is needed.