Medically reviewed by Casey Gallagher, MD Fact checked by Khara Scheppmann Armpit rashes can be caused by allergic reactions, ...

Itching under the arms can occur with or without ... eczema, and Candida yeast infection. Your armpits contain thousands of ...

Tunnels called sinus tracts can form under the skin between the lesions, which can also rupture and leak pus. HS occurs in areas of the body with skin folds, so the armpits are particularly likely ...