It's rare — only 1% of cancers are male breast cancer ... Kurian said men should watch for a lump on the breast or armpit, changes in the nipple such as discharge, redness of breast and lumps ...

The armpit is rich in sweat glands and the pores from these can become blocked, which may go on to become infected, causing a sore lump. Many of these do eventually go on their own, so leave it ...

Less commonly, the pain—referred to as axillary pain—may be due to an autoimmune or arterial disease, nerve compression, and malignancies like breast cancer.The diagnosis of armpit pain may involve ...