The persistent rash under your breasts — the one that burns, cracks, and won't go away no matter what you try — has a name.

It's called intertrigo.

And the reason nothing has worked isn't your hygiene, your weight, or anything you're doing wrong. It's that every product you've used — every powder, every cream, every prescription — was designed for a completely different part of the body. A forearm. A shin. Skin that's exposed to air.

The skin under your breasts isn't exposed to air. It's a sealed fold: warm, dark, moist, with skin pressed against skin around the clock. The treatments you've been using were never built for that environment. That's why they work for a few days and fail. Every time.

If that pattern sounds familiar — a product that helps for a week and then the rash comes back worse — what you're about to read will explain exactly why.

You're not alone

Intertrigo affects millions of women. It has nothing to do with cleanliness.

Thin women. Heavy women. Women in their thirties. Women in their sixties. Women who've just had a baby. Women who've lost weight and now have loose skin that creates new folds.

A woman who showers twice a day can develop intertrigo. A woman with impeccable hygiene can develop intertrigo. Because the problem isn't what's on the skin — it's what the skin fold creates: a sealed environment where moisture can't escape.

Most women who have it don't know its name. Their doctors may have called it a "heat rash," a "friction rash," or simply "irritation." Some were told to "keep the area dry" — without being told why that's nearly impossible in a sealed fold, or what's actually causing the rash in the first place.

If you've spent months or years thinking something is wrong with you, it's not. Something is wrong with the treatments you've been given.

What's actually happening

Intertrigo is a fungal infection. Most women don't know that.

The organism responsible — most often a yeast called Candida — thrives in warm, moist environments with no air circulation. A skin fold under the breast is exactly that environment. Sealed, dark, body-temperature, moist from perspiration that has nowhere to evaporate.

The fungus doesn't just sit on the surface. It builds a biofilm — a microscopic shield that protects it from whatever you apply topically. Think of it as a transparent barrier the fungus constructs over itself. Surface-level treatments hit the biofilm. They don't penetrate it. The infection underneath stays intact.

This is why the pattern is always the same: you apply something, the rash improves for a week, maybe two — the surface layer of fungus dies — and then it returns. Because the biofilm-protected colony underneath was never reached, and the warm, moist environment that feeds it was never changed.

The rash — the redness, the cracking, the burning — is your body's inflammatory response to the fungal colony. The smell is a byproduct of fungal metabolism. Neither is a hygiene issue. Both are symptoms of an infection living in an environment perfectly suited for its survival.

Left: exposed skin (arm, leg) — air, light, evaporation. Right: sealed skin fold — heat, moisture, no airflow. Same treatment, completely different outcome.

The Treatment Problem

Why every product you've tried has failed in a skin fold.

With that understanding, every product you've tried starts to make sense — and so does its failure.

Baby powder and Gold Bond absorb moisture for roughly 90 minutes. Then body heat and perspiration turn the powder into paste. The dry barrier becomes a moist film trapped against the skin. The fungus was never treated — just temporarily dried on the surface.

Cornstarch is worse. Candida is a yeast. Yeast metabolizes starch. Using cornstarch in a skin fold is, quite literally, feeding the organism responsible for the rash. Many women use it on the recommendation of forums or family members without knowing this.

The familiar cycle: baby powder, Desitin, Gold Bond, a prescription tube, coconut oil. Every one designed for exposed skin.

Desitin and zinc-based barrier creams contain zinc oxide, which is a useful barrier ingredient. But Desitin's base is thick petrolatum — an occlusive that seals moisture into the fold. The result: a white paste that transfers to your bra, doesn't wash out, and traps humidity against the skin under a greasy layer.

Coconut oil does the same. It seals moisture in. An occluded fold with coconut oil is warmer and moister than one without it.

OTC antifungal creams — Lotrimin, clotrimazole, miconazole — kill surface-level fungus. This is why they work for a week or two. But their carrier is an emollient base that adds moisture to the fold. The biofilm-protected colony survives. The moist environment persists. The rash returns.

Prescription steroids — triamcinolone, clobetasol — reduce inflammation, which makes the rash appear to heal. But they work by suppressing local immune response. In a sealed fold where the fungus dominates, this removes the body's remaining defense. The rash returns stronger when the prescription ends.

Every one of these was designed for exposed skin. A surface that breathes. A skin fold doesn't breathe. It needs something fundamentally different.

"The moisture-trapping effect of emollient-based antifungals in occluded folds is well-documented. For patients with recurrent intertrigo, the treatment vehicle itself is perpetuating the cycle. A formulation that transitions to a dry barrier addresses the core environmental failure that creams leave open."

— Joanne Calloway, MSN, APRN, CWCN — Wound Care Nurse Practitioner

The Missing Criteria

What a skin fold actually needs — and why it doesn't exist in the drugstore aisle.

A treatment for skin fold intertrigo needs to do two things at the same time.

First: kill the infection — not just on the surface, but through the biofilm, so the protected colony underneath is reached.

Second: keep the fold dry. Not for 90 minutes. For eight, ten, twelve hours — through a full day, through sweat, through movement — so the fungus can't regrow in the moisture it depends on.

Standard creams do the first but add moisture. Powders attempt the second but fail within an hour. No prescription does both. No drugstore product does both.

What's needed is something that doesn't exist in the traditional treatment playbook: a cream that dries to a powder.

A Different Approach

A cream that dries to a powder. Designed for skin folds.

This is the problem Looma Antifungal Cream was formulated to solve.

Looma uses a dual-action approach designed specifically for sealed skin fold environments:

The formula also includes witch hazel distillate to draw out surface moisture on contact and microencapsulated tea tree oil for slow-release antimicrobial protection over 24 hours.

It applies like a cream. It dries like a powder. It stays where you put it. Nothing transfers to your bra. No reapplication at midday. No residue.

Left: cream at application on irritated skin. Right: dry powder finish after 60 seconds.

Application

Three steps. Sixty seconds.

What users are reporting

Three women. Years of wrong products. A different outcome.

Thousands of women across the US have tried Looma. Here are three of their experiences.

★★★★★

"I'd been calling it a heat rash for three years."

"Baby powder every morning. Nobody told me it was fungal. With Looma I saw improvement by day five. Clear at seventeen. I hugged my granddaughter without pulling away for the first time in years."

Karen M. Portland, OR

★★★★★

"I tried Desitin, Gold Bond, and two prescriptions."

"Four years. Nobody told me it was an infection. The rash was gone in three weeks with Looma. I stopped carrying wet wipes in my purse."

Patricia D. Tucson, AZ

★★★★★

"It wasn't my body. It was the cream."

"Post-weight-loss loose skin created new folds. Rash appeared at 44. I blamed myself for three years. Clear in 19 days with Looma."

Denise K. Charlotte, NC

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