The milky white color of the back part of the urine is an abnormal phenomenon, it is recommended that patients go to the regular hospital to check, which may be the manifestation of certain diseases, such as prostatitis, filariasis, inflammation of the urinary system and so on. 1. Prostatitis: If a man suffers from prostatitis, it can appear at the beginning or end of urination, there is milky white mucus from the urethral orifice, and it can lead to cloudy urine, accompanied by frequent urination, urinary urgency, abdominal swelling, perineal area distension, or testicular soreness, and other discomforts. 2. Filariasis: filarial worms in the lymphatic system cause repeated episodes of inflammation, a large number of fibrous tissue hyperplasia, so that a wide range of thoracic ducts and their branches or abdominal lymphatic obstruction, especially around the renal pelvis and calyces of the capillary lymphatic varicose and rupture, resulting in celiac disease, so that the color of the urine in a milky white phenomenon. 3. Inflammation of the urinary system: Inflammation of the urinary system, such as cystitis, urethritis, pyelonephritis, etc., usually leads to the presence of a large number of leukocytes, bacteria, and inflammatory secretions in the urine, which triggers milky-white coloration of the back part of the urine. This symptom alone is not enough to diagnose the disease, this symptom does not rule out that it is caused by other factors. It is recommended that the patient go to a regular hospital in time, ask the doctor to clarify the cause of the disease, give targeted treatment, and strive for early recovery.