What is the reason for jaundice in newborns appearing on the 4th day?

Patient's question:

I'm thinking if it's confirmed to be physiological or breast milk-induced jaundice, can we avoid staying in the hospital for blue light treatment? It's really painful for both adults and children in the hospital, and we can't even see them. Can we sunbathe at home? What should we pay attention to at home? I heard that glucose can help with the treatment!

Doctor's answer:

No treatment is required for physiologic jaundice. Pay attention to keeping the newborn warm, provide appropriate early feeding, and ensure adequate water and calories to facilitate the early excretion of the fetus, reduce enterohepatic circulation of bilirubin, and thereby alleviate the severity of physiologic jaundice. At the same time, it is important to differentiate pathological jaundice with concomitant complications. Most newborns develop jaundice 2 to 3 days after birth, with the latest onset possibly occurring on day 5. Jaundice appearing after day 5 should be considered pathological. The peak of jaundice is typically between days 4 and 5. In full-term infants, jaundice usually disappears 10 to 14 days after birth. Approximately 80% of premature infants develop jaundice after birth, which can resolve within 3 to 4 weeks. Physiologic jaundice is not accompanied by other symptoms, and the child remains in good spirits and responsive. Some newborns may have slightly poor feeding, but this is not a significant concern.

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