A fungal skin infection is one of those things most people try to handle on their own for weeks before calling a dermatologist, and by then, what started as a small itchy patch has usually spread, returned after over-the-counter treatment, or been misidentified as something else entirely. In the Chattanooga area, where summer heat and humidity hang around well into September, the conditions for fungal growth on the skin are about as favorable as they get. Warm, moist environments are exactly what dermatophytes and yeasts need to thrive, and that describes most of Southeast Tennessee from May through October.

The good news is that fungal skin infections are very treatable. The challenge is knowing what you are actually dealing with, because fungal infections frequently mimic other common skin conditions, and treating the wrong one can make the real problem worse.

Common Types of Fungal Skin Infections

Several types of fungal skin infections show up regularly in our Chattanooga office, and each one looks and behaves a little differently.

Ringworm, which has nothing to do with worms, is one of the most recognizable. It appears as a circular, red, scaly patch with a clearer center, giving it a ring-like shape. It can develop on the arms, legs, trunk, or face, and it spreads easily through direct skin contact, shared towels, and even contact with pets. Children and adults who play contact sports or spend time in communal locker rooms are especially prone to picking it up.

Athlete’s foot affects the skin between the toes and along the soles. It causes peeling, cracking, itching, and sometimes a burning sensation. People who spend time in wet shoes, use public pools, or exercise frequently without changing socks are at higher risk. In the Chattanooga Valley, where outdoor activity and humidity overlap for months at a time, athlete’s foot is one of the most common fungal complaints we see.

Jock itch targets the groin, inner thighs, and buttocks. It produces a red, itchy rash that often has a sharp, raised border. Heat, sweat, and friction from tight-fitting clothing all contribute, and it tends to flare during the hottest parts of summer.

Yeast-related skin infections, caused by Candida, tend to develop in skin folds: under the breasts, in the armpits, between the fingers, and around the navel. These infections look red and raw, sometimes with small satellite bumps around the edges. People who sweat heavily, have diabetes, or take antibiotics are more susceptible.

Why Fungal Infections Are So Common in Chattanooga Summers

Tinea versicolor is another yeast-driven condition that creates lighter or darker patches on the chest, back, and shoulders. Patients often notice it after time in the sun because the affected skin does not tan evenly. It is not harmful, but it can be persistent and cosmetically frustrating.

Fungi need warmth and moisture to grow, and Chattanooga delivers both in abundance during the summer months. Average temperatures regularly climb into the 90s, and the relative humidity in the Tennessee Valley often hovers between 70 and 90 percent through July and August. Add in outdoor recreation along the Tennessee River, hiking at Lookout Mountain and Signal Mountain, and time spent at local pools, and the opportunities for fungal exposure multiply.

When Over-the-Counter Treatments Are Not Enough

Sweat-soaked clothing, damp shoes, and prolonged time in swimsuits or workout gear all create microenvironments on the skin where fungi can take hold. This is not a hygiene issue. Even people with excellent skin care routines develop fungal infections when the environmental conditions are right.

Many patients reach for antifungal creams at the drugstore as a first step, and for mild, clearly defined infections, that can work. But there are several situations where self-treatment either fails or delays proper care.

If a rash has not improved after two weeks of consistent over-the-counter antifungal use, it may not be fungal at all. Conditions like eczema, psoriasis, and contact dermatitis can look remarkably similar to a fungal infection, and applying antifungal cream to an eczema flare will not help. In fact, it can sometimes irritate the skin further. A board-certified dermatologist can perform a simple skin scraping or culture to confirm whether a fungus is actually present, removing the guesswork.

Infections that cover a large area, affect the scalp or nails, or keep coming back after treatment typically require prescription-strength antifungal medication, either topical or oral. Scalp ringworm in particular almost always needs oral antifungal treatment because topical creams cannot penetrate the hair follicle deeply enough. Nail fungus is similarly stubborn and usually requires months of oral medication to fully resolve.

How a Dermatologist Diagnoses a Fungal Skin Infection

If you are dealing with a skin condition that has not responded to what you have tried at home, the medical dermatology team at Chattanooga Skin and Cancer Clinic can diagnose the issue accurately and put together a treatment plan that actually targets the cause.

Diagnosis usually starts with a visual examination. Many fungal infections have characteristic patterns that an experienced dermatologist can identify on sight. When the diagnosis is not immediately clear, a KOH preparation, which involves scraping a small sample of skin and examining it under a microscope with a potassium hydroxide solution, can confirm the presence of fungal elements within minutes.

Preventing Fungal Skin Infections During the Summer

In some cases, a fungal culture may be sent to a lab for more specific identification, particularly when the infection involves the nails or scalp or when a patient has not responded to initial treatment. This level of diagnostic precision is one of the key reasons to see a specialist rather than relying on trial-and-error with drugstore products.

Prevention comes down to reducing the amount of time fungi have to grow on your skin. Change out of sweaty clothing and wet swimsuits as soon as possible. Wear moisture-wicking fabrics when exercising outdoors. Keep skin folds dry, especially if you are prone to yeast infections in those areas. Wear flip-flops or shower shoes in public pool areas and locker rooms. Avoid sharing towels, combs, and hats, particularly if someone in your household has a known fungal infection.

Schedule an Appointment

For people who get recurrent fungal infections, a dermatologist may recommend a preventive antifungal regimen during the summer months, such as periodic use of a medicated body wash or a short course of topical treatment at the first sign of a flare.

If you have a rash that keeps spreading, itching that will not let up, or a spot that has not responded to over-the-counter treatment, it is worth getting a professional evaluation. The board-certified dermatologists at Chattanooga Skin and Cancer Clinic have been treating patients across the greater Chattanooga area since 1973. Our Chattanooga office is located at 6061 Shallowford Road and is open Monday through Friday, 7:30 a.m. to 4:30 p.m. Visit our contact page to request an appointment, or call our office to schedule.

Follow us! @chattskinandcancer