Unfortunately, swollen feet, low back pain, and nausea aren’t the only unpleasant symptoms of pregnancy – it can also affect your nose. Pregnancy rhinitis tends to occur suddenly and is thought to be brought on by hormonal changes. Often patients who have never experienced rhinitis before have it for the first time during pregnancy. A history of asthma or allergies doesn’t raise your risk. The good news is your stuffy nose will usually clear up soon after childbirth.