Conversation: The conversation between human and AI assistant.
[|Human|] My son has a big black and blue mark on the back of his calf, doesnt remember bruising it, can barely walk on thart leg it hurts so much, any idea what this is? My son is 11 yrs old, woke up this morning with the mystery bruise, cant even apply pressure on leg withhout hurting, what is this?
[|AI|]  Hello, Such bruise mark can be due to following- -Insect bite-Due to soft tissue injury. If he is not having swelling in foot and leg & there is no fever then there is little to worry. I shall advise you following to have relief in this- -Take rest.-Take an analgesic preparation in child doses like acetaminophen.-Keep limb elevated on pillow. Most probably this will go away with in 3-5 days. If it does not disappear, or he has fever or swelling then please consult to your doctor. Hope I have answered your query. Let me know if I can assist you further. Take care