Crooked face due to unilateral chewing may be due to unilateral chewing muscle development, uneven wear and tear of the whole mouth, etc. It can be improved by adjusting the chewing habit, restorative treatment, etc. The details are as follows. 1. Developed unilateral masticatory muscle: the masticatory muscle of the side that often chews will be more developed than the other side, visually appearing crooked face, by adjusting the biting habit, using both sides to chew, can gradually improve the crooked face. 2. Uneven wear of all teeth: The teeth on one side of the mouth that are frequently chewed will be more severely worn than the other side, resulting in an unstable bite and a crooked face, which can be restored to a normal occlusal contact relationship through restorative treatment to improve the crooked face. It is recommended to visit the hospital in time for targeted treatment.