Conversation: The conversation between human and AI assistant.
[|Human|] got hit in shin by a hard ball, baseball, 2 weeks ago. I iced imediately and it really swelled up, more that a usual hit.  Now the swelling has mostly gone away, but a lump the size of an egg remains and it is painful to both the touch and just walking on it.
[|AI|]  Hello! Thank you for the query. This lump is most likely a hematoma. Due to veins rupture during the injury, blood has accumulated in the soft tissues. This gives a lump which is usually painful. Please note that if the blood collection is large, won't go away by itself. Blood is a great source of nutrition for bacteria. So if it's a blood collection, it will get infected sooner or later and will turn into abscess. I suggest you to consult a surgeon with it. Ultrasound should be done. If the lump is build of fluid, should be Chat Doctor. Hope this will help. Regards.