Dear friend, welcome to HCM!
This symptom is usually due to a nose block/ sinusitis
or a neck spine ankylosis
If you have no ear problems like reduced hearing, rinnging in the ear, pain etc., consider a neck spine Xray and an Xray PNS.
an ENT consult to rule out ENT causes could help.
Can take simple OTC paracetamol
to help till then.
Take care and please keep me informed of your progress.
I hope to have answered your query satisfactorily.