Morning urine, fine foam, saliva. What's going on?

Morning urine see fine foam, like saliva, possible reasons: first, show urine concentration, can show increased solute concentration in urine, then urination, urine and water shock, can produce foam, accompanied by yellow urine color, dark yellow or brown, generally only need to drink more water properly, no special treatment. Second, if there is more protein in the urine, it can also show fine foam, lasting for a long time, not easy to drift, need to carry out urine test or urine protein quantitative examination, diagnosed with proteinuria. Third, if there are white blood cells, pus cells, etc. in the urine, it can also lead to increased foam in the urine, mostly frequent urination, urgency, etc., generally foam lasts for a long time, not easy to dissipate, need to carry out urine routine, urine culture test to determine. Fourth, if there is an increase in urine sugar content in urine, or an increase in bilirubin content, it can also show fine bubbles, generally there is no obvious urinary tract irritation symptoms, and it is necessary to carry out urine sugar, blood sugar, urine bilirubin and other laboratory tests to confirm the diagnosis.