Significant nasal symptoms occur in approximately 30% of pregnant women. Pregnancy associated hormonal changes have direct and indirect effects on nasal blood flow and mucous glands which result in rhinitis symptoms.
Nasal symptoms may begin with pregnancy or may have already existed. Women who have nasal symptoms that begin with pregnancy may experience vasomotor rhinitis of pregnancy. Symptoms are present only during pregnancy, tend to be most prominent in the second half of pregnancy and usually disappear within 5 days of delivery.
Preexisting chronic rhinitis can improve, worsen, or remain unchanged during pregnancy.
Appropriate treatment of rhinitis during pregnancy involves identification of the cause of rhinitis and the use of medications that are safe during pregnancy.