The baby’s fever and oral herpes are considered to be caused by a viral infection. You can give your baby some oral antiviral medications such as Banlangen pellets, pediatric Qing Qiao or pediatric Miao Qiao pellets, antiviral oral liquid, and ibuprofen pellets. If the baby’s temperature is more than 38 degrees 5, you can also take physical cooling methods, such as alcohol wipes, viral infections take 15 to 20 days to recover, keep an eye on the baby’s condition, measure the temperature often, prevent febrile convulsions, breastfeeding mothers eat more nutritious food to promote the baby’s growth and development.