The primary cause is hormonal changes, specifically increased levels of estrogen and progesterone. These hormones can:

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According to experts at The Bump , this "pregnancy nose" can also lead to snoring and disrupted sleep, but the good news is it usually disappears within two weeks of delivery. Safe Ways to Find Relief

Use a Humidifier: Running a cool-mist humidifier in your bedroom at night adds moisture to the air, preventing your nose from drying out and becoming more irritated.