Conversation: The conversation between human and AI assistant.
[|Human|] Hi, A Few days ago I found my upper left arm very painful, very randomly without injuring myself, or even banging my arm. The next day I discovered yellow bruising which has slowly turned into a rather large red/purple mark which looks like blood surfacing to the skin. This has now spread therefore is now a little bigger. This worries me as it has come out of nowhere
[|AI|]  Hello, Your symptoms are suggestive of a hematoma, which could be related to a ruptured artery or local inflammation.  These are the normal stages after the hematoma and I don't think that you should worry about it.  If the problem repeats, I recommend consulting with your attending physician and performing coagulation tests.  Hope I have answered your query. Let me know if I can assist you further. Take care Chat Doctor.