Morning urine yellow foam and does not dissipate may be physiological reasons such as urine concentration caused, may also be pathological reasons such as nephrotic syndrome, diabetes and other disease factors caused. 1. Physiological reasons: If you drink less water the day before, the urine after a night of concentration, containing a large number of organic and inorganic substances, there may be yellow urine, foamy situation, is a normal phenomenon. 2. Pathologic causes: (1) nephrotic syndrome: the permeability of the glomerular filtration membrane is significantly elevated, resulting in a large amount of protein in the blood entering the urine through the filtration membrane, resulting in a large amount of proteinuria, and the elevated level of protein in the urine can lead to an increase in urinary foams, which are mostly fine and last for a long time. (2) diabetes: diabetes can lead to elevated glucose and ketone bodies in the urine, glucose for the abnormal organic matter in the urine, ketone bodies will change the pH of the urine, both of which may lead to the emergence of foam in the urine. Yellow urine foam in the morning and does not dissipate may also have other reasons, it is recommended that patients go to the regular hospital in a timely manner, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.