Fever is an increase in body temperature, which cannot be reduced by foot soaking and may lead to an increase in body temperature. Fever is related to a variety of factors, such as infectious and non-infectious factors. It is recommended to pay close attention to the change of temperature in the armpits, which can be facilitated by warm water baths, use of fever-reducing patches and ice packs. The use of warm water for foot soaking is generally not recommended if you already have a fever. Warm water foot soak may accelerate the blood circulation in the body, and may also lead to an increase in body temperature. It is recommended to go to the General Internal Medicine Department of the hospital for examination to understand the cause of fever. If the axillary temperature has exceeded 38.5℃, antipyretic medications such as ibuprofen and acetaminophen should be given in conjunction with the doctor’s advice. Appropriate medication should also be given for the primary disease to avoid further aggravation.