Blue light sold online will not always be effective in getting rid of jaundice. Although newborn babies with high jaundice can be helped to reduce jaundice by taking a blue light, but if your child needs to take a blue light to help reduce jaundice, do not treat him/her blindly. Because there is no guarantee of the quality of the blue light sold on the Internet, and if you give your child the light yourself, because of inexperience and lack of specialized training, it may lead to aggravation of the child’s condition, resulting in the opposite of what it should be. In addition, pathological jaundice may be caused by hemolysis of the newborn or other major diseases, so if your child develops severe jaundice, you must go to the hospital as soon as possible. If necessary, blood transfusion or other related treatments may be required, and blue light is only one of the treatment measures, the child if the jaundice is serious must be consulted as soon as possible to avoid delaying the child’s condition.