There are mainly three types of bears. First, "brown dark circles" are caused by pigment deposition due to UV rays, friction, repeated rashes, etc. In addition, the area under the eyes, which has one of the thinnest skin on the human body, has poor blood circulation, causing the blue-black blood to show through. Furthermore, due to age-related sagging, the area under the eyes becomes sunken and dark circles appear. For pigmentation, we use light therapy or laser, and for those with poor blood flow, we use light therapy to improve skin clarity and promote blood circulation. Furthermore, it is effective to plump up the skin with hyaluronic acid and eliminate dark circles caused by shadows such as hollows and wrinkles.