This site is a blessing things I would normally ignore I find through reading the posts I should bring up with my GP. I was complaining to my GP about back pain two weeks ago and I thought it was my kidneys. He was sure it was from my MCTD flare. I had no idea about excess protein in your urine causing foaming which I do have. A couple of days ago I had a little blood and pain then tea coloured urine with foam. The last time I had this was last year they thought it was kidney stones, but couldn't find any sign of stones even after a CT scan. At the time my CRP level 9.6 mg/l my understanding is that’s high. I was just going to wait it out thinking it was just another kidney infection or stone. I guess I’ll go see the doc to check for protein and see about doing the CRP test again.