For a one-week-old child, the presence of herpes in the mouth requires a high degree of suspicion of viral infection. Herpes stomatitis is very likely, this disease is caused by viral infection in most cases, the possibility of enterovirus infection is very high, you can use topical watermelon cream spray or open throat sword, oral antiviral drugs for treatment, you can choose acyclovir. If the child has fever, it is necessary to use antipyretic drugs for the child, especially if the temperature exceeds 38.5℃, it is necessary to use antipyretic drugs for the child. If the temperature does not exceed 38.5 ℃, you can first physical cooling, appropriate let the child drink more hot water, with warm water bath. In addition, for children with herpes in the mouth, you need to pay attention to whether the child has a rash on the palms of the hands and feet, if herpes should be considered hand, foot and mouth disease, which is a contagious disease. Although the treatment is the same, hand, foot and mouth disease needs to be treated in isolation at home.