The deepening of the midriff can usually be injected with hyaluronic acid, which can achieve a better filling effect. 1. If the midriff area is too deep, through the injection of large molecules of hyaluronic acid, you can achieve a better filler effect, which is conducive to improving the local symptoms, but also can also play a role in hydration and moisturizing, accelerate the skin metabolism, and improve the quality of the skin. 2. However, the maintenance time of hyaluronic acid injection is relatively short, with the gradual absorption of hyaluronic acid by the human body, the depth of depression may also be partially and gradually restored to the original state, therefore, it is necessary to regularly repeat the injection to maintain the efficacy. It is recommended that patients who want to deepen the hollow by injecting hyaluronic acid should go to regular hospitals or medical institutions and under the operation of professional doctors to prevent adverse reactions.