Breast cancer in adolescent males is virtually unheard of.However,teenage boys going through puberty commonly develop a tender lump under the nipple of one or both breasts. This condition is called “gynecomastia.”caused by hormone changes during puberty, is very common, affecting many teenage boys. It is normal, temporary, and not a sign of breast cancer.
If the pain and swelling of the nipple persists,a visit to the doctor would be a good idea so that you can be reassured and have peace of mind.
Best wishes to both you and your son.