Pityriasis versicolor (tinea versicolor) is a superficial fungal infection seen as pinkish, light brown patches on the skin, which can be accompanied by very fine scaling. It usually appears in hot, humid weather and is quite common. This infection can disrupt the skin's normal pigmentation, causing lighter or darker patches to form.
Lesions show a distinctive glow under Wood's lamp examination. It's usually seen on the trunk, shoulders and upper arms, though it can also appear on the face, neck, groin and legs. It's seen more often in summer when sweating increases, in athletes, swimmers, and those who spend long periods in damp clothing. The causative fungus, called Malassezia, is normally found on the skin. The condition develops under certain conditions when this type of fungus multiplies excessively. Due to differences in skin oil and sweat characteristics, some people have a greater predisposition than others.
You can take the following measures to protect against pityriasis versicolor:
Keep your skin dry: Fungi like moist environments, so change out of sweaty or wet clothing as quickly as possible. Keeping your skin dry is important.
Wear loose, breathable clothing: Choose loose clothing made from breathable fabrics such as cotton. Avoid synthetic and tight clothing.
Avoid hot, humid environments: Try to keep sweating to a minimum in hot, humid weather. Spending time in air-conditioned spaces can be helpful.
Use antifungal products: If you're prone to fungal infections, you can use antifungal shampoos or soaps. Used regularly on your doctor's advice, these products can help prevent recurring infections.
Pay attention to skin care: Cleanse and moisturise your skin regularly, in a way ‘suited’ to your skin. A healthy, strong skin barrier makes it harder for fungi to establish themselves.