One nostril is often more blocked than the other
You have trouble breathing through your nose, especially on one side
You snore or breathe loudly during sleep
You get frequent nosebleeds
You have repeated sinus infections
You feel nasal congestion that does not improve with allergy treatment
You have facial pressure or pain
You notice one side of your nose looks different or crooked
You have a reduced sense of smell
You have trouble sleeping because of nasal blockage
A doctor can confirm it with a nasal exam or nasal endoscopy