The most common reason for the morning foam is proteinuria, you can go to the hospital to do urine routine, urine microalbumin and other related tests, to clarify whether there is proteinuria. If there is proteinuria, we do not have to worry too much, because there are many reasons for proteinuria: first, in the strenuous exercise or fever, will produce a transient proteinuria, after rest or body temperature after normal, proteinuria can disappear on its own. Secondly, urinary tract infection will lead to increased urine foam, after active anti-infection treatment, proteinuria can also disappear. Third, primary glomerulonephritis or secondary kidney disease, may lead to increased urine foam, common such as glomerulonephritis, as well as systemic lupus erythematosus nephritis, allergic purpuric nephritis, diabetic nephropathy can lead to increased urine foam, to improve the relevant examination to clarify the specific causes of proteinuria.