Hello,
I can understand your concern. We all have
facial nerve on both sides of the face that has branches that run from temple, cheek, towards jaw and then to the neck.
If this facial nerve s paralyzed due to some reason, then all the branches and the muscles they supply get affected and face loses sensations on that side. Usually, this nerve paralyzes when there is some lesion like
tumor or trauma which compresses or injures the nerve. However, if your sister had one of these reasons, it would have been diagnosed in the investigations at the hospital. Thus, she is either suffering from viral infection or idiopathic reason (the cause that is not yet deermined).
Symptoms of this
palsy include loss of sensation and numb areas on the side of the face that is affected, dry eyes due to loss of tone of eye muscles, dropping of lips and
drooling of saliva from that side of mouth, loss of saliva causing
dry mouth etc.
Treatment usually involves supportive therapy for dry eyes, dry mouth and facial
massage is advised to regenerate the nerve sensations. Usually, the situation is healed on its own in absence of any obvious reason and the nerves will regain the sensation.
If you
consult a neurologist, he/she can she more light on the disorder by doing in-depth examination and investigations.
I hope this information helps you. Thank you for choosing HCM. I wish your sister feels better soon.
Best,
Dr. Viraj Shah