How do you fix your face after bell's palsy?

Only time and possibly some antiviral medication can get rid of Bell's Palsy. As to the numbness/partial deformation (saggin, drooping look), it might never truly go away or it could completely reverse - this is entirely individual and based on your specific case.

If the damage is truly severe, facial accupuncture or shocking might stimulate the damaged nerves again, but consult a physician for options.