Conversation: The conversation between human and AI assistant.
[|Human|] I got hit in the leg by a car door. I had a decent size bruise it finally went away. Then a knot formed in the same place. Now it s bright red like a burn and seems to have a blister in the center. I can barely touch it. Wind from a fan even hurts it. The knot doesn t seem to move. I get pains in it like someones poking it with a needle. It s below my knee and causes my whole leg to hurt.
[|AI|]  Hi ! Good afternoon. I am Chat Doctor answering your query. From your history, it seems that the bruise of your leg following trauma has now become secondarily infected, and possibly has formed an abscess giving rise to such intense pain.  I would advise you to please visit the ER of a nearby hospital and get it assessed clinically and with other related investigations for a proper management and to prevent any complications. Till that you can go for an over the counter anti-inflammatory Chat Doctor. I hope this information would help you in discussing with your family physician/treating doctor in further management of your problem. Please do not hesitate to ask in case of any further doubts. Thanks for choosing Chat Doctor to clear doubts on your health problems. Wishing you an early recovery. Chat Doctor.