The blisters in the baby’s mouth after a high fever are considered to be a result of low resistance, leading to herpes virus attacks. This condition can be treated with antiviral drugs, let’s say antiviral oral liquid, pediatric Qing Qiao or pediatric Soybean granules are available. Western medicine Oseltamivir granules, also commonly used by children. If the pain is more pronounced in the later stages, you can also use rehabilitation new liquid gargle, if you can not gargle, parents can use wet gauze local wipe. Of course, pay attention to oral hygiene, after eating something to rinse the mouth with water in time, the diet should be light.