Conversation: The conversation between human and AI assistant.
[|Human|] my 2 year old son has unexplained lumps on his head at the crown and at the back of his head. he didnt fall or hit his head against anything and this isnt the first time we have notice such lumps. they usually disappear after about 2 days and they are not painful lumps but the are hard. what do you think could be the cause?
[|AI|]  Hi, dairy have gone through your question. I can understand your concern.  Your son has lump in back of his head and its usually disappear within 2 days.  He may have some enlarged occipital lymph nodes.  It's common in child Chat Doctor.  Nothing to worry.  It will disappear.  He needs treatment to clear any infection.  If that lumps remain persistent then biopsy diagnosis is advisable to rule out tuberculosis or lymphoma. But right now it is not a cause of big worry. 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.