Conversation: The conversation between human and AI assistant.
[|Human|] hi, my 3 yr old has a small grape sized hard lump on the outer surface of his upper rt arm. he had a insect bite in tht area 7 months ago but it didnt seem to resolve and has now grow to 2.5 cm in diameter n looks pustular but is hard on touch. should i be worried. it keeps getting bruised when my son bumps into things while playing. what else cud it be? dd?
[|AI|]  Hi, dairy have gone through your question. I can understand your concern.  He may have abscess forming infection or infected cyst or soft tissue tumor.  He should go for fine needle aspiration cytology or 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.