Patients with HFMD will have herpes in the isthmus of the pharynx, and the herpes will cause sore throat, and some patients will be unable to eat because the sore throat is more pronounced. At this time, if you can drink water, you can eat liquid food, such as rice paste, milk powder, batter, etc., which can ensure the patient’s liquid and energy supply. The sore throat usually lasts for two or three days and then gradually relieves, and it is necessary to replenish the patient’s fluid and energy supply within two or three days. If you can’t even drink water to ensure the fluid and energy supply, you can only replenish fluid and energy through intravenous infusion. Topical medications can also be applied to relieve the sore throat when it is more pronounced, so that the child can eat in. Lidocaine syrup can be applied topically, which has an analgesic effect, but this effect does not last too long, only allowing the patient to eat and drink for about ten minutes or half an hour.