Conversation: The conversation between human and AI assistant.
[|Human|] Hi, I have question about large cruise on my lower back. Ive been involving in to car accident 5 years ago . Its finish with whip splash. After that I was diagnosed with degenerative disc disorder and osteoarthritis in my lower back. About month ago my lower back started bruising without reason and its very stiff. At my work I am very careful ( personal support worker) and I never had any injury related to my job. What can caused that weird bruising?
[|AI|]  Hello and Welcome to Chat Doctor, Thanks for writing to us. The sudden onset of a bruise of unknown cause should not be taken to lightly, this could be an indication of either a blood clotting problem (low platelet production or increased rate of removal of platelets from blood), a reaction to any medications you could be taking (e.g. aspirin, Coumadin, some pain management medication, etc.), accidental ingestion of a poisonous substance (e.g. rat poison, etc.). It is best you just visit a doctor for a blood work up, once all the results return normal, there should be absolutely nothing to worry about, and this bruise could have been caused accidentally (like scratching yourself while you were asleep, etc.). Hope this helps you. Wishing you good health... Regards.  Chat Doctor. Orthopedic Surgeon.