If an infant has a high fever that does not go away, it is mainly due to the following conditions, first of all, it is caused by having toddler’s emergency rash. If the infant suffers from toddler’s emergency rash, it will cause the body’s high fever not to go down, in this case, the child’s mental state is often still good, and eating milk is also normal. In this case, the child can be given timely symptomatic treatment. If the mental state is relatively good, you can give the child more warm water. If it is worse, give the child antipyretic drugs, such as acetaminophen or ibuprofen. Secondly, it is caused by having Kawasaki disease, which is also known as cutaneous mucocutaneous lymph node syndrome. This disease is a vasculitis due to immune function, and children can develop a high fever that doesn’t go away. The duration of the fever is also often prolonged, often greater than 5 days. For this condition, it is important to have a timely cardiac ultrasound performed on the child. This is because some children may have dilated coronary arteries. For Kawasaki disease in children, it is important to treat the child promptly with gammaglobulin.