The “normal lines” are one of the “thirty-eight lines” on the face. The normal lines are not only two lines on the face, but they are also a powerful tool to show your age. The normal lines are the two lines that extend from the sides of the nose down to the mouth, which is a physiological phenomenon of skin aging and skin depression. Usually people who like to laugh easily have wrinkles, when the expression action is large, the face muscles are pulled, it will form wrinkles. If you don’t make expressions, the wrinkles will be flat again, and then the wrinkles are dynamic wrinkles. When the elasticity of the expression muscle is not the same as before due to frequent tugging day after day, the once dynamic lines will gradually deepen, and even when the face is expressionless, you can still clearly see these lines, and they become static lines. If you have already formed static wrinkles, Botox alone can’t solve the demand, so you need to inject hyaluronic acid to fill the depressions of the skin and remove the stubborn lines. Hyaluronic acid is one of the tissues of our body with a strong ability to absorb water, 1 molecule can absorb about 500 times more water. Hyaluronic acid itself can be broken down by enzymes and there is no residual problem. Hyaluronic acid is injected into the subcutaneous dermis in the area of the wrinkles to fill in the depressed areas and improve the growth environment of our skin, thus quickly and effectively restoring the skin to its proper skin elasticity. The effect of hyaluronic acid injection can be seen immediately after the injection. Hyaluronic acid has also been found to promote collagen regeneration in recent studies, and continued injections of hyaluronic acid can prolong the firming effect.