Fungal Acne (Malassezia Folliculitis): Signs and Treatment

Fungal acne is not acne at all. It is Malassezia folliculitis, an overgrowth of a normal skin yeast inside hair follicles that causes clusters of small, similar looking, itchy bumps, usually on the chest, upper back, shoulders and along the hairline. Because it is caused by yeast rather than acne bacteria, it does not improve with standard acne antibiotics and needs antifungal treatment instead.

In India’s heat and humidity, this condition is common and very often mistaken for regular acne. This guide explains how to recognise it and what helps.

What exactly causes fungal acne?

Malassezia is a yeast that lives on nearly everyone’s skin, feeding on the oils our skin produces. Usually it causes no trouble. Problems start when conditions let it multiply inside hair follicles, leading to inflammation and itchy bumps.

Common triggers include:

• Heat, humidity and sweat, especially in Indian summers and the monsoon.
• Tight or synthetic clothing that traps sweat against the skin, including gym wear and helmets.
• Oily skin and heavy oils or creams applied to the body or hairline.
• Recent antibiotics, which reduce the bacteria that normally keep yeast in check.
• Steroid creams or oral steroids, including steroids hidden in some fairness or combination creams.
• Diabetes or reduced immunity.

Research has shown that Malassezia folliculitis mainly affects the trunk and is more common in young men, but women get it too.

How is it different from regular acne?

Feature	Fungal acne (Malassezia folliculitis)	Regular acne
Look	Small, uniform bumps and pustules, all similar size	Mixed: blackheads, whiteheads, pimples, nodules
Itch	Often itchy	Usually not itchy, may be tender
Location	Chest, upper back, shoulders, upper arms, forehead and hairline	Face, chest, back
Blackheads	Usually absent	Commonly present
Triggers	Heat, sweat, antibiotics, steroids	Hormones, oil, genetics
Response to antibiotics	Does not improve, may worsen	Often improves

Many people have both conditions at once, which is one reason why diagnosis by a dermatologist helps.

How is fungal acne diagnosed?

A dermatologist can often suspect it from the pattern and the itch. To confirm, they may:

• Gently scrape a bump and look at it under a microscope with a KOH preparation.
• Use a dermatoscope or Wood’s lamp.
• Occasionally take a small skin biopsy if the picture is unclear.
• Sometimes start a trial of antifungal treatment and see whether it responds.

What treatments work for fungal acne?

Antifungal treatment is the mainstay. Your dermatologist may consider:

Topical treatments

• Antifungal shampoos used as a body wash, such as those containing ketoconazole or selenium sulfide. These are lathered onto affected areas, left for a few minutes, then rinsed.
• Antifungal creams or lotions for limited areas.
• Benzoyl peroxide or retinoids if regular acne is also present, since these can help both conditions.

Oral treatment

For widespread, stubborn or frequently relapsing cases, your dermatologist may prescribe a short course of oral antifungal medicine. These medicines need to be chosen carefully, considering your liver health and other medicines, so please do not self medicate from the chemist.

Maintenance

Because Malassezia is a normal part of skin, relapses are common, especially in hot weather. Your dermatologist may suggest using an antifungal wash once or twice a week as maintenance through the summer and monsoon.

What everyday habits help prevent it?

• Shower soon after sweating, especially after the gym, cricket, commuting or outdoor work.
• Change out of damp clothes quickly. Keep a spare T shirt handy in humid months.
• Choose loose, breathable cotton over tight synthetic fabrics for daily wear.
• Keep heavy oils away from the body and hairline. Coconut and other oils can feed the yeast.
• Use light, gel based moisturisers and sunscreens on oily, sweaty areas.
• Wash pillow covers and towels regularly, and dry them in sunlight where possible.
• Avoid steroid creams. Many over the counter combination creams in India contain steroids that can make fungal infections much worse. Our article on topical steroid misuse explains why.

What if it is on my back?

The upper back and shoulders are among the most common sites. If you are dealing with pimples on your back and chest, read our guide on back acne and body acne, which explains how to tell bacterial and fungal causes apart and what routine helps.

Could it be another kind of folliculitis?

Not every crop of bumps is fungal. Folliculitis can also be bacterial, caused by shaving or waxing irritation, or linked to hot tubs and swimming pools. Ringworm (tinea) on the body is another fungal condition, but it looks different, usually as ring shaped, scaly, itchy patches. Our guide on ringworm and tinea in India explains it. Getting the right diagnosis avoids months of using the wrong cream.

Why is fungal acne so often misdiagnosed?

Fungal acne is easy to confuse with ordinary acne, especially when it appears on the forehead or along the jawline. Many people in India are started on oral antibiotics for what looks like acne, and their bumps either stay the same or get worse. This happens because antibiotics reduce the skin’s normal bacteria, which gives yeast even more room to grow.

Other clues that point toward a fungal cause include:

• Bumps that appeared or worsened after a course of antibiotics or steroids.
• A flare every summer or monsoon that settles in winter.
• Itch, especially after sweating or at night.
• A history of dandruff, since the same yeast is involved in dandruff and seborrhoeic dermatitis. Our guide on dandruff and seborrheic dermatitis explains this link.
• Bumps that look almost identical to each other, like a sprinkle of small dots.

If two or more of these sound familiar, it is worth asking your dermatologist specifically about Malassezia folliculitis.

Which skincare products are better if I am prone to it?

You do not need special or expensive products, but a few choices help:

Choose	Be careful with
Light gel or water based moisturisers	Heavy creams, butters and body oils
Gel or fluid sunscreens	Thick, greasy sunscreen on the chest and back
Gentle, fragrance free cleansers	Harsh scrubs that irritate follicles
Loose cotton clothing	Tight synthetic gym wear worn for hours
Antifungal wash as advised for maintenance	Steroid or combination creams from the chemist

Some people find that oils and rich creams worsen their bumps, while others tolerate them. Notice your own pattern and keep the routine simple.

When to see a dermatologist

Please consult a dermatologist if:

• Your acne is itchy and has not improved with acne treatment or antibiotics.
• Small bumps keep returning on your chest, back or forehead every summer.
• You have been using steroid or combination creams and the rash has spread.
• You have diabetes, reduced immunity, or are taking steroids.
• You are unsure whether it is acne, fungal acne or another infection.

A correct diagnosis can turn months of frustration into a straightforward treatment plan. If you would like help working out what is causing your bumps, you can book an online consultation with Dr. Maria Ansari.