Patients with facial palsy often feel numbness or even complete loss of sensation in the affected side. This symptom is often mistaken as a result of damaged and unrecovered facial nerve function, and has not been given enough attention in treatment. Facial sensation originates from the trigeminal nerve, and when facial sensation is absent, it should be diagnosed as trigeminal nerve palsy. In common clinical facial palsy such as Bell’s facial palsy and Hunt’s syndrome, the virus often involves tissues other than the facial nerve. The trigeminal and facial nerves emanate in close proximity to each other in the brain, and once the facial nerve virus spreads out it disrupts trigeminal nerve function, so it is easy to understand that facial palsy is accompanied by numbness and even loss of sensation. Trigeminal nerve palsy is mainly treated by surgery. Trigeminal nerve palsy surgery steps: Locate and mark the core area of sensory loss (supraorbital foramen, infraorbital foramen, and subchin foramen), and cut the trigeminal nerve trunk in the area of sensory loss near the foramen Dissect the corresponding anatomical area on the healthy side to reveal the nerve trunk. A nerve graft is used to connect the nerve signal from the healthy side to the nerve stump at the lesion.