Phototherapy is treatment with a special type of light (not sunlight). It’s sometimes used to treat newborn jaundice by making it easier for your baby’s liver to break down and remove the bilirubin from your baby’s blood. Phototherapy aims to expose your baby’s skin to as much light as possible.

If jaundice is caused by an underlying health problem, such as an infection, this usually needs to be treated. If the jaundice is caused by rhesus disease (when the mother has rhesus-negative blood and the baby has rhesus-positive blood), intravenous immunoglobulin (IVIG) may be used. IVIG is usually only used if phototherapy alone has not worked and the level of bilirubin in the blood is continuing to rise.