Hyaluronic acid injections on the face are generally not harmful to the body, but only if the regular hyaluronic acid approved by the state is used. In addition, women need to avoid menstruation and pregnancy when injecting hyaluronic acid. If the injection method is improper or irregular hyaluronic acid is used, it may lead to the following hazards: 1) uneven injection of hyaluronic acid will form nodules under the skin and affect the aesthetics; 2) if the hyaluronic acid is injected too shallowly, it will easily cause skin discoloration and even symptoms such as redness, swelling, skin rupture and ulceration; 3) the maintenance time of hyaluronic acid is limited, and it may be gradually absorbed by the body over time, which requires repeated injections to maintain the effect. Repeated injections are needed to maintain the effect. Hyaluronic acid accidents have been frequent in recent years, and many beauty seekers have suffered from rotten face, disfigurement and even blindness after hyaluronic acid injections in irregular institutions. Therefore, when injecting hyaluronic acid, beauty seekers must go to regular medical beauty institutions or hospitals and have their injections done by qualified and experienced professional doctors to ensure the effect and safety of the injections.