Read below about weakness in one side of the face, including causes and common questions. Or get a personalized analysis of your weakness in one side of the face from our A.I. health assistant. At Buoy, we build tools that help you know what’s wrong right now and how to get the right care.

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5 Potential Weakness in One Side of the Face Causes

Disclaimer: The article does not replace an evaluation by a physician. Information on this page is provided as an information resource only, and is not to be used or relied on for any diagnostic or treatment purposes.

  1. 1.Bell's Palsy

    Bell's palsy (facial palsy) causes sudden weakness in facial muscles and makes half of the face appear to droop. The exact cause is unknown, but it's believed to be the result of swelling and inflammation of the nerve that controls the muscles on one side of your face or may be a reaction that occurs after a viral infection.

    Weeks to 6 months

    Rarity:
    Uncommon
    Top Symptoms:
    arm weakness, facial numbness, arm weakness, hearing loss, pain on one side of the face
    Symptoms that always occur with bell's palsy:
    face weakness, weakness in one side of the face
    Urgency:
    Primary care doctor
  2. 2.Stroke or Tia (Transient Ischemic Attack)

    A stroke is a medical emergency. Strokes happen when blood flow to the brain is stopped.

    Indefinite

    Rarity:
    Common
    Top Symptoms:
    dizziness, new headache, leg numbness, arm numbness, stiff neck
    Symptoms that never occur with stroke or tia (transient ischemic attack):
    bilateral weakness
    Urgency:
    Emergency medical service

    Weakness in One Side of the Face Checker

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  3. 3.Stroke or Tia (Transient Ischemic Attack)

    A stroke is a medical emergency. Strokes happen when blood flow to the brain is stopped.

    Indefinite

    Rarity:
    Common
    Top Symptoms:
    new headache, dizziness, stiff neck, being severely ill, vision changes
    Symptoms that never occur with stroke or tia (transient ischemic attack):
    bilateral weakness
    Urgency:
    Emergency medical service
  4. 4.Stroke or Tia (Transient Ischemic Attack)

    A stroke is a medical emergency. Strokes happen when blood flow to the brain is stopped.

    Indefinite

    Rarity:
    Rare
    Top Symptoms:
    new headache, dizziness, being severely ill, stiff neck, arm numbness
    Symptoms that never occur with stroke or tia (transient ischemic attack):
    bilateral weakness
    Urgency:
    Emergency medical service
  5. 5.Chronic Ear Infection (Suppurative Otitis Media)

    Chronic Suppurative Otitis Media is persistent drainage from the middle ear due to a damaged membrane. It is considered chronic when it lasts for more than 6 weeks.

    6 to 12 weeks or more

    Rarity:
    Rare
    Top Symptoms:
    ear canal pain, pus leaking from the ear, hearing loss in one ear
    Symptoms that always occur with chronic ear infection (suppurative otitis media):
    pus leaking from the ear
    Urgency:
    Primary care doctor

Questions Your Doctor May Ask About Weakness in One Side of the Face

  • Q.Was your fall:
  • Q.Where exactly is your hand pain?

If you've answered yes to one or more of these questions, try our weakness in one side of the face symptom checker to find out more.

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Weakness in One Side of the Face Symptom Checker Statistics

  • People who have experienced weakness in one side of the face have also experienced:

    • 7% Pain on One Side of the Face
    • 6% Headache
    • 3% Throbbing Headache
  • People who have experienced weakness in one side of the face had symptoms persist for:

    • 36% Over a Month
    • 34% Less Than a Week
    • 19% Less Than a Day
  • Source: Aggregated and anonymized results from visits to the Buoy AI health assistant (check it out by clicking on “Take Quiz”).

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