Hello, boys have too thick lips. If they are naturally influenced by genetic factors, it is suggested that they can get rid of the bad habit of biting or even licking their mouths, and often grin, which will help to make their lips thinner. In addition, they should consider surgical resection and plastic surgery for thick lips, and then locally change the shape of lips and improve the external contour to correct the appearance. There is no other way for the time being, pay attention to eating irritating food often.