hi everyone i have a few questions about mouth ulcers and kidney problems i was in the hospital about 2 weeks ago they tested my kidneys and found a little bit of blood but the dr said that was normal and nothing 2 worry about which i dont understand how thats normal and everytime i urinate it burns is this normal? then i found this lil sore in my mouth on the inside of my lip which hurts sumtimes i am not sure if its and ulcer or not its really small and i usually get them on the inside of my cheeke has any one experienced this before?