Hello everyone. Maybe someone had it. The daughter has a temperature o…

Hello everyone. Maybe someone had it. The daughter has a temperature of 38-38.5 for three days. Throat is clean, no runny nose, doesn't cough. A nurse came, lungs are clean. There are no teeth, but nothing turned red or swollen, even though both hands feel very strong in the mouth when eating. She behaves as usual, only sometimes cries more than usual and sleeps more. There is no discharge anywhere. What could this be?