The first urine in the morning is full of foam may be caused by dietary factors, urinary tract infection, chronic nephritis or diabetes. 1. Dietary factors: if the patient daily intake of more protein food, the composition of the urine will change, if the amount of water consumption is low, the formation of more foam when urinating. 2. Urinary tract infections: lead to an increase in the content of urinary protein, can also lead to the emergence of more foam protein in the urine, in the process of urination to produce oscillating effect and produce more foam. 3. Chronic nephritis: many patients with chronic nephritis have kidney damage, different degrees of damage will lead to some protein leakage, therefore, protein leakage, the formation of a large number of bubbles in the urine. 4. Diabetes: diabetic patients with glucose in the urine, or diabetes control is not good, diabetic nephropathy, the increase of protein in the urine, foamy urine can occur. If the above symptoms occur, it is recommended to go to the hospital in a timely manner, under the diagnosis of the doctor to determine the condition, early formal treatment.