Conversation: The conversation between human and AI assistant.
[|Human|] Hi my name is jeleesa and I have a 5 year old son, that fights with his older brother alot just yesterday he said that they bumped heads while playing but the next morning a hard painless knot almost the size of a golf ball appeared under the left side of his jaw what is that? Please help me
[|AI|]  Reclothe swelling below the jaw may be hematoma due to injury. You said that the trauma was on head and the site of swelling is around jaw. This swelling may be unrelated to the trauma. The most common cause of swelling below the jaw is lymph node swelling. Uncommon cause is swelling of salivary gland. Sometimes swelling may remain unnoticed, and it is detected incidentally. I would request you to consult a pediatrician for proper evaluation of the swelling and management accordingly. Regards