Thank you for your question. It sounds like your son has Allergic Rhinitis (sensitive nose). To find out more about Allergic Rhinitis, please read my article on Allergic Rhinitis that was published in Human.
Allergic Rhinitis in children often results in a blocked nose and mouth breathing. In children below 8-10 years old, their tonsils (immune glands at the back of the throat) and adenoids (immune tissues at the back of the nose) are often big.
These, together with a blocked nose, can lead to upper airway blockage during sleep. This condition is known as Obstructive Sleep Apnoea (OSA). Children with OSA may present with loud snoring, excessive daytime sleepiness, inability to concentrate in their studies and behavioural problems (e.g. Attention Deficit Hyperactivity Disorder). To find out more about OSA, do read my article on snoring & OSA that was published in Human.
I would strongly suggest bringing your son to an ENT Specialist for an assessment. A complete head & neck examination including a nasoendoscopy (relatively painless scope through the nose) will be required to assess the potential areas of narrowing in his upper airway. OSA in children are often due to a combination of blocked nose as well as enlarged tonsils and adenoids.
Hope this helps and all the best!
