Facial fillers may present hazards such as localized bruising, hematoma, uneven skin, and infection. Facial fillers are injected into the face using materials such as hyaluronic acid and autologous fat to achieve a filling effect. Since the face is rich in blood vessels, if the filling process is not properly operated, local skin bruising or hematoma may occur, and in serious cases, vascular embolism may result. If the injected material is not evenly distributed during the filling process, there may be uneven skin, asymmetry of the face, and localized hard knots. Failure to pay attention to personal hygiene after filling may also cause infection, resulting in redness, swelling and itching of the skin. If you need facial filler, you need to go to a regular hospital to reduce the risk of treatment.