Foamy urine early in the morning and not during the day may be normal, but do not rule out pathological factors such as glomerulonephritis, urinary tract infections and so on. 1. Normal: usually, the human body after a night’s sleep, the urine is in a concentrated state, if the metabolites are more, there will be foamy urine early in the morning and not during the day. At this time, there are usually no other symptoms, even if the routine urine examination, the indicators are normal. 2. Glomerulonephritis: due to inflammation, resulting in glomerular filtration abnormalities, micro-proteinuria, after the night precipitation foamy urine early in the morning and not during the day, may also be accompanied by eyelids and other parts of the edema. 3. Urinary tract infection: after the urinary tract infection, leukocytes increase in urine, a large number of leukocytes gathered to form pus cells, increased urinary secretions, night precipitation can appear in the morning urine foam. At this time, it is also often accompanied by frequent urination, urinary urgency and other uncomfortable symptoms. If the patient has foamy urine early in the morning and not during the day, accompanied by the above symptoms, it is recommended to consult a doctor in a timely manner, under the guidance of the doctor, improve the relevant examination, to clarify the cause of the disease, targeted treatment.