It is very common for a fever to cause herpes, and there are more types of herpes, such as when a fever causes herpes of the mouth and lips, which is more common. The herpes virus is normally found around the lips and mouth of a person, but when the body’s resistance is strong, it is less likely to cause an infection, so the herpes does not appear. However, during fever, the body’s resistance is often weak, and dehydration can easily occur, so these viruses take advantage of the opportunity to infect the body, leading to the appearance of herpes on the lips. Often the use of antiviral drugs, as well as the treatment of fever reduction, are more effective, you can use the four seasons antiviral combination or ribavirin granules. If the temperature of the fever is high, above 38.5 degrees, you can use ibuprofen suspension for fever reduction. There are other types of herpes, such as the occurrence of herpes pharyngitis, which is often a viral infection that causes herpes and fever, and needs to be treated with busulfan anti-inflammatory oral solution.