One nostril is often more blocked than the other
You have trouble breathing through one or both sides of your nose
Nasal congestion keeps happening even when you do not have a cold
You snore or breathe noisily during sleep
You get frequent sinus infections
You have frequent nosebleeds
You feel pressure or pain in your face
Your nose feels blocked on one side when lying down
You notice one side of your nose looks different or crooked
You have reduced sense of smell
You have a history of nasal injury or trauma
A doctor can confirm it with a nasal exam or endoscopy