Address abscesses. People with underarm hidradenitis suppurativa often develop armpit abscesses, painful lumps under the skin that are filled with pus. Usually caused by a bacterial infection, they ...

Some causes of underarm rash include infection, allergic reaction, and inflammation. Itchy, inflammatory, bacterial, or fungal rashes in your armpit can be mild or severe, short-lived or chronic.

Add Yahoo as a preferred source to see more of our stories on Google. Getty Images Raise your hand if you’ve got some drama happening in your underarms. If you often get pimples, blackheads, or larger ...