Erythrasma is a superficial skin infection caused by the bacterium Corynebacterium minutissimum. It particularly occurs in warm, moist areas (the armpits, groin, under the breasts, between the toes, etc.). It is seen more often with obesity, diabetes, excessive sweating, poor hygiene, humid climates and conditions where the immune system is suppressed. This infection usually appears as reddish, brown or pink patches, and fine scaling may be seen on the lesion. Patients may experience mild symptoms such as itching and burning in these areas.
When a special UV light called a Wood's lamp is used during diagnosis, erythrasma lesions show a “coral red” glow.
The first-choice treatment is usually antibiotic or antiseptic creams, though oral antibiotics may be needed for widespread or resistant cases. Keeping the infected areas clean and dry also speeds up healing during treatment. For prevention, it's important to wear cotton, breathable clothing that reduces sweating, keep skin folds dry, and pay attention to hygiene in shared spaces.
Keeping the immune system strong (a balanced diet, regular sleep, etc.) also helps prevent the condition and stop it recurring. Erythrasma is an infection that can be easily controlled with the right treatment, but because there's a risk of recurrence, hygiene and skin care remain important.