Dr Phil Kieran: What can my teen do about her repeat sinus infections? 

They leave her feeling miserable and she's stressed about her upcoming Junior Cert, which probably isn't helping

Sinusitis can be caused by infection, most commonly colds, flu, or other winter bugs. It can also be due to allergic responses, including hay fever or dust, or to chemical irritation from air pollution, perfumes, or other chemicals. Picture: iStock 

My 15-year-old daughter has started getting sinus infections, which leave her feeling miserable. So far, they’ve cleared up with nasal rinsing, and she has not needed an antibiotic. She’s stressed about her upcoming Junior Cert, which probably isn’t helping. Is there anything she can do to prevent repeat infections?

Most people know what sinusitis is and how it feels, but surprisingly, the medical definition is vague.