Oliver Bee RMTRegistered Massage Therapist

Massage therapy · Kitchener–WaterlooBell's Palsy

Jaw & Head

What It Is

Bell's palsy causes sudden weakness in the muscles on one side of the face, which usually develops over a few days (NHS, 2023). Half of the face may appear to droop. Your smile becomes one-sided and the eye on that side of the face may be difficult to close. The condition can occur at any age (NINDS, 2026). Even though the exact cause isn't known, it's believed to be the result of inflammation and swelling of the nerve controlling the muscles on that side of the face. It may be a reaction that occurs after a viral infection, most often thought to be the herpes simplex virus (NINDS, 2026; Madhok et al., 2016). Bell's palsy is a type of facial palsy, and it is the most common cause of facial paralysis (NHS, 2023).

For most people, the condition is temporary. Symptoms often begin improving within a few weeks, and most people get better within six months, although it can take longer for some (NHS, 2023). A small number of people continue to have some facial weakness or other symptoms for the rest of their lives (NHS, 2023; Madhok et al., 2016). Rarely, the condition can come back, sometimes years later (NHS, 2023).

Even though the reason the condition occurs is unknown, it may be linked to a viral infection. With Bell's palsy, the nerve controlling the facial muscles, which passes through a narrow channel of bone on its way to the face, becomes swollen and inflamed. As well as the facial muscles, the nerve affects saliva, tears, taste and hearing on that side. So, as well as weakness on one side of the face, you may notice a drooping eyelid or corner of the mouth, drooling, a dry mouth, loss of taste, a dry or watering eye, or sounds seeming louder than usual (NHS, 2023; NINDS, 2026).

Bell's Palsy Anatomy

The facial nerve (also called the seventh cranial nerve) connects the brain to the muscles that control facial expression, such as frowning and smiling (NINDS, 2026). It also supplies the muscles used for closing the eyelids. It is mainly a nerve for movement, rather than for feeling (sensation) in the face. The facial nerve also carries taste sensations from the front part of the tongue to the brain, and helps to control tears and saliva.

Not a diagnosis — for more information, contact me or another trusted healthcare provider.

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