Hi, while urine can definitely be a very useful tool in helping to determine if anything is going on with the kidney, I think that just foamy urine is a bit too vague to be able to make any assumptions. If you are really worried about it and it seems to be abnormal, definitely check with your physician to see if they want to go forward with some other testing. We will be here, as always, if you need anything else! Keep on keepin' on, DPM