<s>[INST] I woke up this morning with purple bruising all the way around my waist, about the size of an ace bandage all the way around. It just appeared; I haven't bumped into anything recently and have not worn any constricting clothing that would have caused it. I had intense stomach pain a while ago when I ate, but it's dulling now. Do you have any idea what it could be? Should I go get it checked out? Help please. [/INST] HISudden unexplained bruising needs immediate evaluationThis could be a liver problem or a low platelet problem and you need an exam and blood work to further evaluate the problem </s>