Facial numbness is observed in neurological, dental, vascular and oncological diseases, traumatic injuries. It is less often detected in patients with mental disorders, infections, parasitosis, and some other pathologies. Most often unilateral. It can be temporary or permanent, covering the entire half of the face or a specific area. The cause of the condition is established according to the survey, external, neurological and dental examination, imaging and laboratory techniques. Treatment includes neuroprotective agents, anticonvulsants, antibacterial agents, and physiotherapy.