Bell’s palsy is a sudden weakness — usually a partial or complete droop — of one side of the face, caused by inflammation of the facial nerve, the nerve that controls the muscles of expression. It typically develops over hours to a couple of days: one corner of the mouth stops lifting, the eyebrow will not raise, the eyelid may not fully close. In most cases no specific cause is found, which is what ‘idiopathic’ means, although research links many cases to reactivation of common viruses, such as the cold-sore virus, within the nerve.
Two facts frame everything else in this article: Bell’s palsy is usually temporary, and its first hours are not the moment for internet research — they are the moment for a doctor.
## The First Hours: Treat It as an Emergency
A sudden facial droop must be assessed by a doctor the same day — as an emergency. Not because Bell’s palsy is a stroke; it is not. But sudden facial weakness is also one way a stroke can present, and no one can safely tell the difference by looking in a mirror. Doctors distinguish the two clinically — checking, among other things, whether the forehead is involved and whether there are other symptoms such as limb weakness, slurred speech or vision change — and sometimes with scans. Ruling out a stroke is step one. Step two is that early treatment for Bell’s palsy itself works better the sooner it starts.
## The Typical Course, Honestly
The outlook is genuinely good for most people. The majority begin to improve within two to three weeks and recover substantially within three to six months — many completely. Early medical treatment, most commonly a short course of corticosteroids prescribed by a physician and ideally started within seventy-two hours, measurably improves the odds of full recovery. A minority are left with lasting weakness, or with synkinesis: miswired regrowth of the nerve that makes, for example, the eye narrow when the person smiles. Honest medicine means saying both things: most people do well, and not everyone does.
## Myths, Corrected
- **A cold breeze or air conditioning did not cause it.** The folk explanation — a draught, an open car window, sleeping under the AC — is not supported by evidence. The trigger is inflammation of the nerve, most often linked to viral reactivation, not cold air on the face. - **It is not contagious.** You cannot catch Bell’s palsy from someone, and a person who has it poses no risk to others. - **It is not usually permanent.** Most people recover well, especially with early treatment. Lasting asymmetry affects a minority.
## Living With Asymmetry — and When to Seek Specialist Help
In the early weeks, the most important practical issue is the eye: if the eyelid does not close fully, the cornea can dry out and become damaged, so lubricating drops, ointment and taping the eye closed at night — as advised by your doctor — matter more than anything cosmetic. Facial physiotherapy, guided by an experienced therapist, can support recovery and help manage synkinesis. For the minority whose asymmetry becomes established — generally judged only after twelve months or more, once further natural recovery is unlikely — a specialist facial assessment is reasonable. Options range from physiotherapy-led retraining to targeted procedures in selected cases; what is appropriate is highly individual, and no procedure returns a face exactly to what it was. For long-standing asymmetry, an assessment with [Dr. Augusto Valente](/augusto-valente) can clarify whether any option is worth considering in your specific case.
If facial asymmetry has persisted long after Bell’s palsy, a consultation offers an honest, pressure-free assessment of your individual situation — including, where it is the truthful answer, the advice that no intervention is needed.
