Which way does the face-paralyzed mouth lean?

Patient's question:

My father had been feeling uncomfortable with his mouth at home recently and went to the hospital for a check-up. The doctor said he had facial paralysis. Looking at my father, I noticed he hadn't changed much. I want to ask, which side does the mouth of someone with facial paralysis usually?

Doctor's answer:

Facial nerve palsy is a condition caused by facial neuritis, requiring antiviral and anti-inflammatory treatment. Nutrient nerve supplements such as methylcobalamin and vitamin B12, along with corticosteroids, can be used. Acupuncture can also be applied in acute cases. If the corner of the mouth droops to the right, it often indicates inflammation on the left side of the facial nerve, requiring timely treatment. In elderly patients, if facial palsy recurs after prolonged acupuncture or electrical stimulation, it suggests the primary facial palsy was on the right side.

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