Newborn jaundice 270 μmol / L is certainly pathological jaundice needs to be treated, blue light irradiation is the most effective treatment, as for the severity of newborn jaundice 270 μmol / L also depends on the first few days of life, jaundice 270 μmol / L within one week of birth is still very serious to be treated as soon as possible, otherwise it will continue to rise leading to kernel jaundice, bilirubin encephalopathy may be. Newborns with 270 μmol/L after two weeks or almost one month of age have a relatively low risk of developing kernicterus, but they still need treatment, otherwise they will affect their intelligence and their future vaccinations.