The symptoms of numbness in the face during sleep are considered to be caused by facial nerve palsy and cerebrovascular diseases. 1. Facial nerve palsy: also called facial neuritis, common in patients with low immunity, wind or viral infections and other reasons, resulting in facial nerve damage to the face numbness and other symptoms, may also appear in the corner of the mouth salivation, puffing cheeks leakage and other symptoms. Can use antiviral drugs under the guidance of the doctor, and massage physiotherapy and other ways to alleviate, usually avoid blowing directly on the fan, air conditioning. 2. Cerebrovascular diseases: cerebrovascular diseases that are prone to face numbness include cerebral hemorrhage, cerebral infarction, etc., which can cause local nerve root damage or loss of nutrients due to cerebral hematoma compression or vascular obstruction, resulting in numbness in the face. Cranial CT or MRI is needed to clarify whether there is cerebrovascular disease, and hospitalization is necessary. In addition, sleeping in an incorrect posture leads to prolonged mechanical pressure on the face, which can also lead to numbness in the face. It can be relieved when the triggers are removed. Numbness of the face is closely related to the cephalic and facial nerves, and it is recommended to consult a doctor for timely examination and treatment to avoid delaying the condition.