Most normal babies’ urine is light yellow in color. But the baby’s body fluid loss, urine concentration, the color of urine will become dark; and long-term urine yellow may indicate the existence of a certain in disease. General infant urine yellow is common in the following situations: 1, insufficient feeding: two or three days after the birth of a newborn, the relative lack of breast milk and insufficient intake of water to make urine concentrated, resulting in less urine, urine yellow. At this time, you need to strengthen nutrition, supplemental water, urine color will become lighter. 2, jaundice: two or three days after the birth of a child will appear jaundice, because the high level of bilirubin in the blood and can be excreted through the urine, the urine color is yellow. Physiological jaundice, generally no special treatment, as long as attention to adequate feeding, will slowly subside on its own, the phenomenon of yellow urine will also disappear. 3, digestive system diseases: due to the imperfect development of the baby’s digestive system, when there is diarrhea, abdominal pain, a lot of dehydration and other phenomena, the lack of water in the body will also lead to yellow urine, then you need to replenish body water, treatment of diarrhea, and so diarrhea improved, the phenomenon of yellow urine will naturally disappear. 4, urinary tract infection: baby fever, reluctance to eat milk, pale face should consider whether there is urinary tract infection. When you find that your baby is crying when urinating or has frequent urination or yellow urination, you need to exclude urinary tract infections and should see a doctor early for routine urine examination and early treatment.