Needle injection: the doctor holds the prepared hyaluronic acid injection, and at the position of the marking point, the inclined plane of the needle tip forms a certain angle with the skin. When the needle tip reaches the deep periosteum or dermis, start injection after blood drawing, and press injection while withdrawing the needle until satisfactory results are achieved.

Blunt needle injection method: the sharp needle breaks the skin at the marked needle entry point, obliquely penetrates the blunt needle from the outside to the inside, sticks to the periosteum, goes up to the injection point, draws blood, then injects, presses and smoothes it, and if necessary, a small amount of supplementary injection can be made under the skin where the depression has not been satisfactorily corrected. Blunt needle injection can almost avoid injection into blood vessels and is safer.

Ice compress method: If the doctor chooses the needle injection, he will generally ice the injection site 10- 15 minutes before injection to prevent intraoperative bleeding. If you choose a blunt needle injection, you don't need ice.

The above three methods are for reference only and need to be selected according to personal situation and doctor's advice.