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Sinusitis is an infection of the sinuses (the air-filled, bony cavities around the forehead, cheeks, nose and eyes). They can become infected when blocked by swelling or mucus due to colds or allergies. Sinusitis occurs most often in older children and adults. It is not common in babies and toddlers. Bacteria (germs) cause sinus infections, so an antibiotic is needed to help make your child well.
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