Facial nerve recovery typically begins at the mastoid area behind the ear. The facial nerve canal is adjacent to the inner ear and the tympanic chamber. In addition, the facial nerve contains motor, sensory, and parasympathetic fibers, and the facial nerve nucleus, which is mainly located in the ventral-lateral part of the caudal end of the cerebellum, can innervate the muscles of mastication and levator palpebralis, as well as the facial muscles, the ear muscles, and the occipital muscles. When affected by cold, rheumatism, viruses, trauma and other factors will lead to damage to the facial nerve, thus causing facial muscle paralysis. By the same token, if the condition improves and the facial nerve canal is relieved of conditions such as stenosis and edema and oozing, infections can occur in areas such as the inner ear bones and the middle ear mastoid, which are immediately adjacent to the facial nerve canal. As the condition recovers, the innervation ability becomes better and better, the facial muscles begin to recover gradually, facial expression management, cheek puffing, etc. gradually improves, followed by the complete recovery of taste, sensation and muscle function. After facial nerve damage, you should actively cooperate with the treatment, go to the hospital for review on time, and communicate with your doctor at any time if any abnormality occurs.