Postnasal drip during pregnancy

By trimester

Weeks 1–13

1st trimester

Postnasal drip can start early as rising hormones swell the blood vessels lining your nose. A saline rinse or spray, extra fluids, and a cool-mist humidifier at night are good places to start before reaching for anything stronger.

Weeks 14–27

2nd trimester

The drip often keeps going into the second trimester instead of easing up, since it's driven by hormones that stay elevated rather than a passing bug. If saline alone isn't enough, ask your provider about layering in a steroid nasal spray.

Weeks 28–birth

3rd trimester

Extra blood volume in the third trimester can make the swelling, and the drip, more noticeable, especially once you lie down at night. Sleeping propped up on an extra pillow and running a humidifier can ease the nighttime cough it triggers.

What does the evidence show for postnasal drip?

• A steroid nasal spray like fluticasone works right at the site of swelling in your nose and hasn't been linked to a higher chance of birth defects, even with regular use. 1
• Close to a third of pregnant women deal with this kind of drip and congestion, most often starting in the first trimester and driven by rising estrogen and progesterone rather than a virus. 2
• The swelling behind the drip comes from pregnancy hormones acting on blood vessels in your nose, so simple steps like saline rinses and nasal strips are worth trying before anything stronger. 3
• Rhinitis shows up in as many as one in five pregnancies, and intranasal steroid sprays are considered safe to use throughout pregnancy when drip and congestion don't ease up on their own. 4
• Oral decongestant pills are best skipped, especially in the first trimester, since they've been tied to a higher chance of certain birth defects, while saline rinses and nasal dilator strips carry no such risk. 5
• Bacterial sinusitis becomes more likely when nasal symptoms persist beyond 10 days, show a double-worsening pattern, or present severely with a fever of 102°F or higher plus purulent drainage and facial pain for several days running. 6

When should I call my provider about postnasal drip?

Congestion or drip that drags on beyond 10 days without improving, or that seems to ease up and then suddenly gets worse again, points more toward a sinus infection than ordinary pregnancy-hormone drip. A high fever of 102°F or higher together with thick, colored drainage for several days in a row marks the more severe end of sinus infections and is worth calling your provider about the same day. Facial pain or pressure alongside either of these patterns is another reason to get checked rather than wait it out. If you are ever unsure which side of the line you are on, make the call. Obstetric teams handle these check-ins as routine, not as overreacting.