The thickness and thinness of the beard is determined by genetic factors, so it cannot be deliberately forced. If it is too thin, it can be improved through phototherapy, dietary adjustments and surgery. The thickness of the beard is firstly related to genetic factors, so it cannot be deliberately forced. If the beard is too thin, it may also be caused by abnormal hormone levels in the body, and you need to go to the hospital to have your hormone levels checked. Phototherapy: Micro-needling, PRP and other treatments can stimulate the hair follicles under the skin, mainly for the location of the existing beard, which can increase the density. Dietary adjustments: the usual diet can pay attention to eat more meat, seafood, leeks, potatoes and other foods help androgen level secretion. You can also increase the number of shaving, you can also use ginger to do local massage can play a role in promoting beard growth. Local can also be used externally hair potion or minoxidil solution also play a role in the thick beard. Surgery: Hair transplant surgery can effectively change the density of hair. Optical and surgical treatments need to go to a regular medical institution to avoid adverse consequences.