I notices some white sediment in my urine the other day at the doctors, and then I checked it at home and I see it has lots of little bubbles. I am noticing that lately there is white stuff on top...I can't tell if the white stuff is bubbles or sediment. In a cup I saw a little sediment and a bunch of foamy bubbles. Everything I looked at said kidney failure!!! My doctor does a protein dip stick test each time, so I think they would have caught it if it was protein. I did a dipstick UTI test and came out negative for white blood cells and nitrates. I left a message for my doctor about an hour ago, but wondering if anyone else has experienced this! Thanks!