Below is an instruction from Human. Write a response.
    ### Instruction:
    How to diagnose Periodic fever, aphthous stomatitis, pharyngitis and adenitis ?
    ### Response:
    How is periodic fever, aphthous stomatitis, pharyngitis, cervical adenitis (PFAPA) diagnosed? There are no laboratory tests or imaging procedures specific to the diagnosis of PFAPA. This condition is clinically diagnosed in individuals who have a history of 3 or more episodes of fevers that last up to 5 days and recur at regular intervals without other evidence of acute illness.
    