If you usually have no physical discomfort, but one day you wake up and find that something is wrong with you, suddenly you can’t drink and rinse, when you look in the mirror, you find that half of your face is unnatural, the nasolabial folds have become shallow, the forehead lines have disappeared, the corners of your mouth are drooping, and when you whistle, you can’t even whistle, then it is likely that you have facial nerve palsy, or facial palsy as the people say. Facial palsy, also known as Bell’s palsy, is a simple peripheral facial nerve paralysis that is not accompanied by other signs or symptoms that are not clinically certain of the cause. The exact cause of facial palsy is still unknown, but Chinese medicine believes that it is due to the lack of qi and blood in the human body and the attack of wind and cold on the face and ears, causing local stagnation of meridians and tendons and veins. Many patients complain of no abnormality when they are sleeping, but in the morning they find that they cannot drink and rinse, and they do not even know it themselves, but others find that their faces are not right. It may manifest as crooked mouth, inability to puff and blow, incomplete closure of upper lids, loss of forehead lines, and even changes in taste, hearing, tears and saliva. Treatment includes controlling inflammatory edema, improving local blood circulation, reducing nerve compression, restoring nerve conduction function and strengthening muscle contraction, actively performing functional training of various paralyzed muscles, and if necessary, feasible facial nerve canal decompression surgery. Prevention: prevent the face, especially behind the ear, from being exposed to wind and cold, such as not sleeping on windows or roofs at night in summer, and not exposing the back of the ear to cold wind for a long time when riding on trains or automobiles.