Bell's palsy during pregnancy

By trimester

Weeks 1–13

1st trimester

Bell's palsy is less commonly reported early in pregnancy. New facial weakness still needs immediate assessment, and medication decisions should account for timing, severity, eye closure, and competing causes.

Weeks 14–27

2nd trimester

A clinician should examine the whole face and the rest of the nervous system rather than assuming that one-sided weakness is Bell's palsy. Eye protection becomes urgent when blinking or full closure is impaired.

Weeks 28–birth

3rd trimester

Published pregnancy series place most Bell's palsy episodes in the third trimester. Because hypertensive disorders were also reported in these cohorts, blood pressure and obstetric symptoms deserve attention without assuming that one condition caused the other.

What does the evidence show for bell's palsy?

• Bell's palsy usually begins suddenly on one side, can impair eye closure, and warrants prompt medical assessment to exclude more serious causes such as stroke. 1
• A scoping review of 15 studies and 559 pregnancy cases found that 65% occurred in the third trimester, but the authors could not pool outcomes because the underlying evidence was small and low quality. 2
• A pregnancy-focused narrative review reported that corticosteroid initiation within three days was associated with better recovery, while also emphasizing limited pregnancy-specific evidence and the need to weigh medication risks. 3
• A systematic review and meta-analysis identified 809 pregnant patients across 25 studies, with most episodes in the third trimester and reported coexisting hypertension, preeclampsia, and diabetes that do not establish causation. 4
• Sudden facial weakness accompanied by arm or leg weakness, speech difficulty, vision change, severe unexplained headache, loss of balance, or dizziness requires a 911 call for possible stroke. 5

When should I call my provider about bell's palsy?

Call 911 for sudden new facial droop or weakness, including when no other symptom is obvious. Arm or leg weakness, speech difficulty, confusion, vision change, severe unexplained headache, dizziness, or loss of balance adds concern for stroke. After emergency assessment, inability to close the eye plus eye pain, redness, or vision change needs urgent eye care. 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.