A newborn jaundice level of 23.1 indicates a very serious condition, classified as hyperbilirubinemia. It is advised to seek medical attention promptly and undergo active treatment, while also identifying the cause to prevent the occurrence of bilirubin encephalopathy. Actively investigate the cause of the jaundice, such as whether it is caused by incompatibility hemolytic disease due to blood type mismatch, and provide appropriate treatment to allow the baby’s jaundice to disappear as soon as possible.