So I have a mole / spot / nodule on my back which has been there for years and it's about 4mm diameter. Every so often it seems to get sore and itchy for no obvious reason and I scratch I the top off it, it gets crusty and bleeds, and then eventually heals up and I forget about it again.
I'm now worrying that perhaps it could have been cancerous all along? But wouldn't it have grown bigger by now if that was the case? Or I would have had other symptoms? I've literally had it for years. It's generally a pink colour and appears to have regular borders.
Can moles sometimes do this and not be cancerous?