Foamy urine disappeared in 2 minutes may be caused by normal physiological factors, or may be caused by nephritis, nephrotic syndrome and other diseases. 1. Physiological factors: patients who urinate too quickly or more urine, will lead to the emergence of foam after urination, foam is more time to disappear will also be extended, so the patient will have the performance of the urine foam 2 minutes disappeared. 2. Nephritis: the cause of nephritis is not clear, may be due to viral, bacterial and other pathogenic infections. Patients will have symptoms such as hematuria, proteinuria, edema, etc., so patients will have the phenomenon of urine foam disappearing in 2 minutes. 3. Nephrotic syndrome: the cause of nephrotic syndrome is still not clear, may be due to genetic, immune, infection and other factors. The main symptoms of patients are proteinuria, hypoproteinemia, edema and so on, so the patients will have the performance of urine foam disappeared in 2 minutes. 4. Other: patients with urine foam disappeared in 2 minutes may also be diabetic nephropathy, hypertensive nephropathy and other diseases. To summarize, there are many reasons for patients to have foamy urine that disappears in 2 minutes, so if you feel sick, you should consult a doctor in time.