When the tongue is extended, the tip of the tongue is tilted to one side, either left or right, which is called tongue distortion. When the tongue muscle on the sick side is paralyzed, it is unable to contract, and when it is slightly extended, the tongue body is unevenly skewed on both sides, so the tip of the tongue is to the left when the left tongue muscle is paralyzed, and to the right when the right tongue muscle is paralyzed. This condition is commonly associated with stroke, i.e. cerebrovascular accident. The facial nerve and hypoglossal nerve, which govern the lower facial muscles, are damaged. The lingual nerve is connected to the brain and the tongue is the prior organ of the brain. A stiff and crooked tongue is mostly a precursor to problems such as stroke and facial paralysis. High blood pressure, diabetes, hyperlipidemia, obesity, and smoking are all important factors that lead to stroke. The facial nucleus and the hypoglossal nucleus, which innervate the lower facial muscles, are unilaterally (contralaterally) innervated, except for the other cerebral nerve motor nuclei, which receive fibers from bilateral cortical nuclei bundles. Damage to the upper motor neurons on one side may produce paralysis of the facial muscles below the fissure of the eye and the tongue muscles on the opposite side of the lesion, manifested by loss of the nasolabial groove on the opposite side of the lesion, drooping of the corners of the mouth and deviation to the side of the lesion, salivation, inability to perform cheek puffing and tooth exposure, and deviation of the tongue tip to the opposite side of the lesion when extending the tongue. In case of peripheral facial nerve palsy on one side, all facial muscles on the side of the lesion can be paralyzed, manifested as loss of frontal transverse lines, inability to close the eyes, drooping of the corners of the mouth and loss of the nasolabial folds. Damage to the motor neurons under the hypoglossal nerve on one side may result in paralysis of all the tongue muscles on the focal side, manifested by a deviation of the tongue tip to the focal side when extending the tongue. In individual cases of peripheral facial nerve palsy, a deviation of the tongue can be seen, in which case the tongue is always deviated to the healthy side. This is due to paralysis of the caudate lingualis and palatal lingualis muscles innervated by the facial nerve. It is a good idea to use the left hand more often. Studies have found that nearly 70% of stroke patients are caused by ruptured microvascular bleeding in the right cerebral hemisphere. If the left hand is deliberately exercised, the function of the nerves in the right hemisphere of the brain and the elasticity of the blood vessels are exercised, which helps prevent stroke. The nasolabial groove on the opposite side of the lesion disappears, the corners of the mouth droop and deviate to the side of the lesion, salivation, inability to do cheek puffing and tooth exposure, and tongue tip deviation to the opposite side of the lesion when extending the tongue, so timely examination is still necessary. Tongue palsy is a precursor of facial nerve palsy. Facial neuritis, Bell’s palsy, commonly known as “facial palsy”, “crooked mouth”, “hanging line wind”, is a common disease characterized by motor dysfunction of the facial expression muscle groups. It is a common disease characterized by motor dysfunction of facial expression muscles. It is a common and frequent disease, which is not limited by age. Patients are often unable to perform even the most basic movements such as raising the eyebrows, closing the eyes and puckering the mouth.