 [ Symptoms ] bruise that never goes away and is warm to touch what is it  i have what looks like a bruise on my leg light purplish however it is not a bruise it is not sore to touch and has been on my leg for several years i recently noticed that this dark mark on my leg is significantly warm when you touch it what could it be and should i be concerned [ Disease ] if you get these symptoms when you are due for vitamin b 12 injection then you should immediately get it done even if after that also the symptoms does not subside then you should consult your physician and get further evaluation done like an echo cardiogram and cbc hope this helps