Fungal Acne: What It Is and Why Normal Acne Treatments May Not Work

If you have small, itchy bumps that look like acne but refuse to improve with benzoyl peroxide, salicylic acid or even antibiotics, you may be dealing with something different. “Fungal acne” is the popular name for a condition called Malassezia folliculitis (also known as Pityrosporum folliculitis). It is not true acne, and it often needs a different approach.

What causes it?

Malassezia is a type of yeast that lives on almost everyone’s skin without causing problems. Under certain conditions it multiplies inside the hair follicles and causes inflammation, leading to small bumps. Triggers can include:

heat, humidity and heavy sweating;
tight, non-breathable clothing, especially workout gear;
recent use of oral antibiotics, which can disturb the balance of microbes on the skin;
oily skin and rich, oily skincare products;
a weakened immune system or certain medications such as steroids.

How it differs from regular acne

Itch: fungal acne is often itchy. Ordinary acne usually is not.
Uniform bumps: it tends to appear as clusters of small, similar-sized red bumps or pustules, rather than a mix of blackheads, whiteheads and larger pimples.
Location: most common on the chest, upper back, shoulders and upper arms. On the face it often appears along the hairline, forehead and sides of the face.
No blackheads: it does not usually produce comedones.
Response to treatment: it often does not improve, or worsens, with standard acne treatments, especially antibiotics.
Triggers: it may flare in hot weather or after sweating.

Our guide to types of acne describes what true acne lesions look like for comparison.

Getting a diagnosis

Because the two conditions look similar and can occur together, it is worth seeing a doctor or dermatologist if you suspect fungal acne. They may diagnose it by its appearance, or by taking a gentle scraping from the skin to look for yeast under a microscope. A correct diagnosis avoids months of using the wrong products.

What usually helps

Treatment aims to reduce the overgrowth of yeast and prevent it coming back. A doctor may suggest:

Antifungal washes: shampoos containing ketoconazole, selenium sulfide or zinc pyrithione are sometimes used as a body or face wash, left on for a few minutes before rinsing.
Topical antifungal creams: applied to affected areas.
Oral antifungal medication: for widespread or stubborn cases, prescribed and monitored by a doctor.

Do not start prescription-strength treatments without medical advice, as they are not suitable for everyone.

Prevention and daily habits

Shower and change clothes soon after sweating. Our article on acne skincare routines covers gentle cleansing.
Wear loose, breathable fabrics.
Choose lightweight, oil-free skincare and sunscreen. Some people find certain oils and fatty ingredients worsen fungal acne.
After treatment clears it, some people use an antifungal wash once a week to help prevent recurrence, if their doctor agrees.

Can you have both?

Yes. Many people have regular acne and fungal acne at the same time. In this case, treatment may combine standard acne products with antifungal measures. This is another reason a professional assessment is helpful.

When to see a doctor

See a doctor if you have itchy, uniform bumps that have not improved after several weeks of standard acne treatment, if they appeared after a course of antibiotics, or if they are spreading or uncomfortable.

Quick answers

Is fungal acne contagious? No. Malassezia yeast lives on almost everyone’s skin, and the condition comes from overgrowth, not from catching it from someone else.

Can diet cause fungal acne? There is little good evidence that specific foods cause it. Heat, sweat, clothing and recent antibiotics are more established triggers.

Will it come back? It can, especially in hot, humid weather. Good post-sweat habits and, if your doctor agrees, an occasional antifungal wash help reduce flare-ups.

The bottom line

“Fungal acne” is a yeast-related follicle problem, not true acne. Itchy, uniform bumps on the chest, back or hairline that do not respond to acne treatments are a clue. A doctor can confirm it and recommend antifungal treatment.