My 3yo has had a constantly blocked nose for the past 12 months. Not a runny one, no itchy or red eyes, no sneezing, just greenish/yellowish discharge when he blowes his nose. He is allergic to dust mites but our doctor doesn’t think that the blocked nose relates to the allergy. Is anyone else in a similar situation or can give some suggestions on what we can do to clear the blocked nose? Many thanks