Have you heard that babies can’t get sinusitis because they don’t have sinuses? Not true! Mark Rizzi, MD, attending physician in the Division of Otolaryngology (ENT) at Children’s Hospital of Philadelphia, provides a useful review for primary care, including: an overview of sinus formation by age; allergic rhinitis and other pre-disposing factors; how to decide if a routine URI has become sinusitis and antibiotics are warranted (you don’t necessarily need to wait 10 days); neti pots, nasal steroids and other adjuvant treatments; complications to look out for, including unremitting headache for intracranial spread; prevention tips; when to refer to ENT or the ER; and more.