Red lips and fever in children may be related to common cold and Kawasaki disease. 1. Common cold: when the virus invades the body, it will release toxins to cause disorders in the regulation of the body temperature center, resulting in fever. When the body temperature rises during fever, the blood circulation is faster and the blood vessels of the lips are richer, which will cause the child’s lips to be red. 2. Kawasaki disease: it may be related to infection, immune factors, genetic factors and other factors. Fever can occur, while the mucous membrane of the mouth and lips will be congested, causing redness of the lips, accompanied by skin rashes and swollen lymph nodes in the neck. Children with red lips and fever may also be seen in other causes, it is recommended to consult a doctor in a timely manner, follow the doctor’s instructions to carry out relevant examinations, with the help of the doctor to clarify the cause, and targeted treatment or therapy.