% of people with unilateral pear vortex. The occurrence rate of natural dimples in oriental nationalities is 1: 18, with one dimple accounting for 34.2%, two dimples accounting for 59%, three dimples accounting for 5.6%, four dimples accounting for 5.2%, 1 dimple accounting for 59.6% in the left cheek, and most dimples appear in the two cheeks.