When the pear vortex makes a "smile" expression, the facial muscles contact each other, resulting in a depression called a "dimple". Some people call it a "laughing nest", or it is also called a "pear vortex" because of its different location and size. Not everyone has dimples, but people who have dimples also have different shapes and heights. Under subdivision, dimples are located about 2-2.7 cm above the corners of the mouth, and there are three kinds of dimples: round, oval and fissure. Generally, dimples are the most obvious when you laugh. And there is a nest on the face, called pear vortex. The pear vortex is located at the lower side of the corner of the mouth, about 1 cm. Pear vortex is smaller than dimple, so it is not clear. The formation of dimples is mainly genetic. It can also be obtained through plastic surgery. Compared with dimples, pear vortex is even rarer. Dimples are generally dimples on both sides of cheeks, and pear vortex refers to dimples on both sides of corners of the mouth. Although the two are a little close, they are different. Moreover, dimples are generally obvious and deep, while pear vortices are shallow and difficult to show, so we often see dimples easily, but pear vortices are not easy to see, so pear vortices are rare.