(HealthDay News) -- When the mastoid bone in the skull becomes infected, it's called mastoiditis. Often it's triggered by an infection in the middle ear, and it's most common in children.
The U.S. National Library of Medicine mentions these symptoms that may indicate mastoiditis:
Tamiflu Helps Keep Severely Ill Kids Out Of The ICU, Study Finds
The Flu Vaccine Can Lower Your Risk Of Heart Attack And Stroke — Even If You Wind Up Infected
RFK Jr. Says Fewer Flu Vaccines for Kids May Be a 'Better Thing'
They Spent Hours In A Room Full Of Flu Patients And Walked Out Healthy — Here's How
Scientists' Push For a Universal Vaccine Takes a Key Step Forward