Hi Dear,
Welcome to Health Care Team.
Understanding your concern.
Numbness on left side of left could be due to cold temperature, nerve dysfunction or
nerve damage.
Facial nerve is the nerve which supplies to face and any damage to it can cause numbness of face, paralysis of face as well.
Numbness on left side of face is more serious concern as it could be
facial paralysis, a symptom of stroke. It could be bell's palsy but as no drooping of face so chances less.Viral infection can also cause the same.
Well its not a
sinus infection, would suggest you to go for its proper diagnosis first and then treatment accordingly as blood thinners, rehab therapies, antiviral drugs,
corticosteroids all are treatment options for this.
Would advice you to do daily mouth exercises at least 20-25 min.
Hope your concern has been resolved.
Best wishes,
Dr. Harry Maheshwari