The milky white color of the anterior segment of children’s morning urine may be due to physiological factors or some pathological factors such as lymphatic reflux obstruction, urinary tract infection and so on. When the external environment is colder, drinking less water will lead to the discharge of salt crystals thus causing the urine to become cloudy and appear milky white. It is common during the cold season and is generally harmless. In some children, celiac disease occurs due to impaired lymphatic reflux or congenital anomalies, and white urine can occur when the urine is rich in fatty substances such as celiac disease and fat particles. When children have urinary tract infections caused by microbial infections, the symptoms of pyuria will appear, mainly manifested as milky white urine, containing filamentous suspensions and so on. There may be other reasons for the milky white color of children’s morning urine, it is recommended to go to the hospital in time, improve the examination to clarify the cause of the disease, under the guidance of the doctor to give targeted treatment or treatment.