What are the signs of male breast cancer or infection?

See below: Breast cancer in men is rare, usually occurs over age 60, and is usually a painless firm mass under the nipple. Breast infection is also uncommon in males & would be a swollen, red, painful lump. Gynecomastia is a painful firm lump under the nipple in men & more common. Need to see a doctor for an examination to help you differentiate these.

They are generally: the same signs as females have. For cancer, a lump. For infection, pain, redness, swelling, and maybe a lump.