The acne marks produced after long acne, including color change and depressed acne marks two kinds of cases, if the acne marks are just formed, it is recommended to choose to use sodium heparin compound cream or polysulfonic acid mucopolysaccharide cream, can maximize the newly formed acne marks eliminated, also can be used with the use of silicone gel for application, can make the depressed acne marks back to the flat. If the pimple marks are formed for a long time, the above methods are not applicable. For the erythematous pimple marks that have existed for a long time, it is recommended to choose to use the Q532 laser for treatment, which can maximize the removal of the remaining erythematous pimple marks on the top of the skin. However, it is recommended to choose to use it 2-3 times to have obvious effect. If it is a long-term depressed scar, it is necessary to choose to use fractional laser or dermabrasion, which can make the depressed skin proliferate again, and gradually return to the flat state.