A fungal skin infection happens when a fungus (such as yeast or mold) grows and creates a reaction on your skin surface.

The armpit area, in particular, is prone to sweat and friction, which makes it even more susceptible to irritation, particularly considering how sensitive the skin in this region is. "Skin folds ...

According to Mayo Clinic, adults usually develop heat rash in skin folds and where clothing runs against the skin and causes friction. Infants tend to be affected on their neck, shoulders and chest.

According to Mayo Clinic, adults usually develop heat rash in skin folds and where clothing runs against the skin and causes friction. Infants tend to be affected on their neck, shoulders and chest.

Some medications produce highly distinctive patterns, like the “V” of the chest and upper back frequently affected in photosensitive drug reactions, or the predominance of skin fold ...

You may have several skin folds around your abdomen, groin, and breasts. When skin rubs against skin, the resulting friction can lead to irritation and pain.

Sebopsoriasis presents as a red or purple rash with yellow, greasy scales. The rash typically appears within skin folds and on the face, scalp, and chest.