The exact time for red acne marks to disappear varies from person to person, and it normally takes 5 to 6 months for them to fade away. When there are pimples on the face, often leave red or black acne marks after the pimples subside, and the red acne marks is due to local inflammation and caused by capillary dilation, the skin usually need about 5 to 6 months to gradually recover and fade, the specific time to fade depends on the individual physique, the metabolism of each person is different in time. If the patient’s red acne marks are delayed, you can go to the hospital to use medication to intervene, such as the use of adapalene gel, polysulfonic acid mucopolysaccharide cream and other creams that do not contain hormone ingredients, external application, but also the use of pulsed-dye laser and intense pulsed light treatment can accelerate the receding of red acne marks. It is recommended that the patient’s red acne marks in the period of receding should do a good job of sun protection of the skin, do not let ultraviolet rays for a long time to irradiate the skin, so as not to lead to hyperpigmentation, the drug should be used under the guidance of the doctor.