Regrettably, hyaluronic acid injections cannot be immediate and effective, and the facial improvement effect will take at least a week. Just two days before the treatment, do not touch the water, pay attention to sunscreen repair, and wait for the short-term "shock reaction" of the skin, which is the beginning of its beautiful transformation. The reason for this is that the skin that has just been injected with hyaluronic acid is still in the repair stage, and the hyaluronic acid as the basic formula begins to absorb water, and it will take about a week to show the effects of facial hydration and reduction of fine lines.