Some common skin infections may show up as an armpit rash. Tinea corporis is commonly called “ringworm," but it's actually a skin infection that's caused by a fungus, not a worm. There are ...

Dark underarms may simply have to do with pigmentation and levels of melanin in the skin. But sometimes armpit discoloration is a sign of a health condition. Learn more here.

The cat mainly stays in the patient's room. He denies any outside activities. Tinea corporis is a superficial fungal infection involving the body and face, with the exclusion of the beard area in men.