Social Security Administration. The Social Security Administration assigns social security numbers; administers the retirement, survivors, and disability insurance programs known as Social Security; and administers the Supplemental Security Income program for the aged, blind, and disabled. SSA.
Prosopagnosia is a neurological disorder characterized by the inability to recognize faces. Prosopagnosia is also known as face blindness or facial agnosia.
Nerve Damage. One leading cause of face numbness is injury or damage to a nerve. According to the Mayo Clinic, Bell's palsy is a paralysis of the facial nerve. This weakening can be sudden, or occur over the course of a couple days. A family member usually notices the patient's slurred speech or unresponsive facial muscles.