Question
The baby has been experiencing a fever for the past few days, with a body temperature of about 38.2 degrees. After several days of taking Nimesulide dry suspension, the fever subsided. However, the baby has developed white ulcers inside the mouth, causing pain and loss of appetite. At the same time, there is also a runny nose. One day after discontinuing medication, the baby received a Japanese encephalitis vaccine. On the third day after vaccination, several red rashes were found near the abdomen and legs, some of which were flat and the rest were red. It is uncertain whether these are allergic reactions to the vaccine or diaper rash. The baby is no longer feverish but has poor appetite. Is the baby suffering from hand, foot, and mouth disease? How should oral ulcers be treated?