Hello.
Thank you for your query at DoctorSpring.com
I understand your concern.
The term viral nerve is not appropriate, better way of putting it will be ' nerve injury secondary to viral infection. That is a common cause of numbness/tingling on one side of the face. The other causes as he rightly said could be due to reactivation of chicken pox or shingles, pinched nerve, or bell's palsy which is again a nerve related injury and is due to Ebstein Barr Virus. One other rare cause is lyme disease. But in that case both sides are involved.
The problem with such viral infections is there is nothing much you can do except for watchful waiting and hoping the body is able to withstand the infection. The good thing is if it was Bell's palsy, you would have developed some drooping of eyelids and deviation of angle of mouth by now. It seems more like a viral neuritis and it will recover in due course.
However do get back to me, if you develop any other symptoms.
Regards.

Hello,
You can expect gradual recovery every day. If at any point you feel the symptoms are getting worse do report your local doctor immediately.
Viral neuritis can take up to 7-10 days to recover fully.
Regards.