I had a urine test done that showed blood so I was asked to do another test which was ok! The problem I have is I have been getting a sharp pain in my kidney area which when it subsides leaves a dull ache which is there all the time. As the last test was ok the doctor says everything is fine. I am waiting for a specialist referral so not sure what to do. I have unspecific vasculitis, can this affect the kidneys?