The facial nerve extends from the base of the skull, winds around the ear, passes through the salivary gland, and divides into many branches that connect to various facial muscles, the tear gland, and the tongue. Sometimes the facial nerve becomes compressed, usually behind the ear, due to inflammation from a viral infection, tumors, or injury. If the nerve sustains damage as a result of such compression, symptoms including facial weakness, paralysis, spasms, and twitching can manifest. Other consequences may include inability to properly close the eye, excessive tearing, drooling, and inability to taste certain foods.
Antiviral medications, antibiotics, or steroids may be prescribed to stop infection, reduce swelling, and improve circulation to the area. In certain cases medical treatment is insufficient, however, and surgery may be performed to relieve the pressure on the facial nerve. Decompression is achieved by removing bone around the involved area, usually behind the ear.

Surgical Procedures to Decompress the Facial Nerve
Different procedures may be performed depending on the cause of compression, location of damage, and other factors.