I've got a black mark under my big toenail it's been there for month, yesterday it seemed to get bigger and more red and looked as if it was bleeding, then this morning it has gone back to the size it's always been, not sure what to do as it seems trivial to go to the Dr's about, it doesn't hurt but the side of the toe sometimes goes red, doesn't burn but feels numb. I was diagnosed with type 2 diabetes about 10 years ago now they are saying I have LADA diabetes not sure what that is and have gone onto three injections a day, was wondering if that might be the cause of toe?!