<s>[INST] hi i have recently been getting a pin in my arm pit and i felt around adn i have a lump thats not very big but hurts a lot to toutch and i also have the same thing in my left  nipple.please help is this serious. i am a 21 year old male very activethanks you [/INST] Hi, dairy have gone through your question. I can understand your concern. You may have fibroadenoma, fibroadenomas or fibrotic disease or some other benign breast lesion.  Chances of cancer is very rare at your age.  Still you should go for examination and if needed go for biopsy of that lump. It will give you exact diagnosis. Then you should take treatment accordingly. Hope I have answered your question, if you have doubt then I will be happy to answer. Thanks for using Chat Doctor. Wish you a very good health. </s>