What are the symptoms of sinusitis in a child? · stuffy nose · thick, colored drainage in the nose · drainage down the back of the throat (postnasal drip) · headache. My son who is 4 years old has had several ear and sinus infections due to severe allergies. he is frequently on antibiotics, and he has been on allegra every day for the past 2 years. this past winter my son had a sinus and ear infection that would not resolve. the doctors put him on 3 separate rounds of antibiotics, each round getting stronger. Does your child need antibiotics for a sinus infection? · sinusitis year old chronic 4 symptoms (nasal congestion, sinus pressure/headache, facial pain, sore throat, cough) lasting for 10 days . These infections usually occur after a cold or after an allergic inflammation. there are four types of sinusitis: acute. symptoms of this sinusitis year old chronic 4 type of infection last less than four weeks and get better with the appropriate treatment. subacute. this type of infecti...