24/02/2026
Both a stroke and Bell’s palsy can cause sudden facial weakness, which is why they are often confused. However, they are very different conditions with very different levels of urgency.
🔴 Stroke (Central cause)
A stroke occurs when blood flow to part of the brain is disrupted.
Facial presentation:
🔴Usually affects the lower half of the face
🔴The forehead is often spared
🔴Person can usually still wrinkle their forehead
🔴May have arm weakness, speech difficulty, confusion, or balance problems
Prevalence & demographics:
🔴 ~12 million strokes occur worldwide each year
🔴Risk increases significantly after age 55
🔴More common with high blood pressure, diabetes, smoking, heart disease
🔴Stroke risk doubles approximately every 10 years after 55
Stroke = medical emergency
🔵 Bell’s Palsy (Peripheral cause)
Bell’s palsy results from inflammation or irritation of the facial nerve (CN VII).
Facial presentation:
🔵Affects entire half of the face
🔵Forehead involved
🔵Difficulty wrinkling forehead
🔵Trouble closing the eye
🔵Drooping mouth
🔵Possible changes in taste or tearing
Prevalence & demographics:
🔵Affects ~15–30 per 100,000 people per year
🔵Can occur at any age
🔵Most common between 15–45 years
🔵Slightly more common in pregnancy and individuals with viral infections
🔵Most people recover partially or fully within weeks to months
Key Clinical Clue
🟡Forehead movement
If the forehead still moves, suspect stroke
If the forehead does not move, it's likely Bell’s palsy, but never self-diagnose facial weakness.
Seek urgent help if facial drooping is sudden and accompanied by:
🟡Arm weakness
🟡Slurred speech
🟡Confusion
🟡Severe headache
🟡Loss of balance
An accredited Biokineticist can assist with appropriate rehabilitation once medical management is in place.