Conversation: The conversation between human and AI assistant.
[|Human|] I have a lump under my left nipple, slightly painful, tender and a bit hard when I touch it. Only noticed this in the last 24 hours. I am a 29 year old male, good health, non smoker and non drinker. Also, weight not much of an issue for me as I am relatively slim build. Any suggestions as I am concerned.
[|AI|]  Hi, Welcome to Chat Doctor. That lump could be a fibroadenoma or a cyst. You need to show it to a surgeon for a physical examination to help reach a diagnosis. He may even ask up to get a needle biopsy of the lump. Finally depending upon the diagnosis, its excision can be planned. Usually at your age the chance of malignancy is very rare, so you need not worry much about its aspect. Hope I have been helpful.