If the mouth askew is caused by facial paralysis, it can be corrected by muscle training. The specific method can be to train the muscles of the patient's face and mouth, promote local blood circulation, and increase the fullness of local muscles to correct oral skew. Patients can also exercise their teeth occlusion and masseter muscles through repeated chewing, such as chewing food with a chewing head. You can also exercise your facial expressions, you can choose to grin in front of the mirror or brush your teeth with your cheeks, and at the same time quit bad eating habits.