It is better to bleed slightly than not to bleed with hydrafacial injections, and this is due to the layers of the skin that are injected with hydrafacial injections. Hydrafacial injections are to be injected into the dermis layer of the skin, which is roughly divided into three layers, namely, the epidermis, the dermis and the subcutaneous tissue. Where the epidermis does not contain capillaries, the dermis contains capillaries, and the medication is injected into the dermis during the hydrafacial injection. Hydrafacial injection is through the pointed needle of the hydrafacial gun, the drug will be injected into the dermis layer, in the process of injection, it is inevitable that a part of the dermis layer of capillaries will be damaged, after the damage of the dermis layer will have a slight hemorrhage, on the surface of the skin will show a spot-like hemorrhage.