Hello- I am a new poster. Over the past few weeks , I have come out with loads of these on my back- thought it was skin cancer but GP says not. GP wants to do blood tests to 'rule out' other things as he says it can be a sign of serious illness in the body, which seems a bit daft as I feel fit and well, so I am resisting. I've just googled (I know you shouldn't but...) and seems it's a precursor for various cancers, esp gastric. Anyone had any experience of this symptom please?