Males can develop breast cancer, though the incidence is much lower than female breast cancer. Risk factors for the development of male breast cancer include increased exposure to estrogen, reduced androgen, history of orchitis secondary to mumps, undescended testis, testicular injury or cirrhosis of the liver, and a family history of breast cancer.
I would suggest you have yourself seen by your doctor. The tender lump you are experiencing in your areola could be caused by a localized infection or an abscess.
Yes men do get breast cancer. The good news is its usually not painful.....but get it checkd out.