A sunken forehead can be caused by congenital genetics or dysplasia, or by trauma and infection. A sunken forehead not only makes a person look older, but also tends to produce head lines and affects facial beauty. If the bones and muscles of the forehead are corrected accordingly, the sunken bones and muscles can be restored to flatness and elasticity, which has obvious forehead augmentation effect. If the forehead is sunken due to acquired factors, it is recommended to go to the hospital to identify the cause and improve the sunkenness with symptomatic treatment. If it is congenital heredity, filler treatment or cosmetics can be used to trim the sunken area. Fillers are mainly hyaluronic acid, collagen and autologous fat, the effect of the first two fillers is maintained for about 1 year, and later can be supplemented according to the absorption, while autologous fat can achieve more stable effect after 2-3 times of filling, and the effect can usually be maintained for a long time. For women with a slightly sunken forehead, it is not necessary to carry out filling treatment, and applying bright cosmetics to the sunken area to make it feel like augmentation can achieve the effect of visually full forehead. Of course, if the forehead depression is more obvious and affects normal life, it is still recommended to go to a regular hospital and perform filler surgery if necessary to improve the forehead depression.