Just a foamy look
IT is a sign of protein in the urine. Can be from heavy lifting, stress, kidney damage, etc.. Not really any warning signs except on a blood test the Albumin levels might be low which would be making you hold excess water. Sometimes a high cholesterol level is a sign also. Take your blood tests to a sharp internal medicine guy or tell them to me on here and I can kind of guide you from what I have learned so far. Basically it is called proteinuria and there are various levels of excretion. A 24 hour urine test is the best thing to do and your doctor can get you the results from there.