Tonsillitis, the inflammation of the tonsils due to infection, is common among common in children. Symptoms are swelling of the tonsils, fever, and headache. Older kids might also complain of abdominal pains.
Thanks to the vaccine, mumps outbreaks became rare. However, some kids still get the virus, making them sustain abnormal swelling of the cheeks, headaches, fatigue, and flu.