Hello,
Judging from your description it sounds like
facial nerve palsy, otherwise called Bell's palsy.
In most cases it is benign and most patients improve spontaneously over several weeks. Medication with
steroids and antivirals may help regeneration if started in the first few days.
However, in some cases, it may be in the setting of a neurological condition or metabolic issues like
diabetes.
So you must be checked by your primary physician or a
neurologist for other possible signs which would warrant
MRI imaging as well as testing for diabetes.
As I said in most cases it is isolated and improves spontaneously with tests turning out normal, but you should be seen to confirm the diagnosis.
Hope I have answered your query. Let me know if I can assist you further.
Take care
Regards,
Dr Olsi Taka, Neurologist