The pigmentation after acne elimination is mostly inflammatory pigmentation, which can be eliminated by topical medication and physical therapy. 1. Topical medication: The acne marks left after the elimination of acne may be caused by not doing a good job of sunscreen or improper cleaning, etc. If the acne marks are relatively mild, they can be repaired and improved through the use of topical retinoic acid ointment, cyanoquinone cream and other drugs. 2. Physical therapy: patients can also through photorejuvenation, picoseconds and other physical means, using the principle of broad spectrum color light to break down subcutaneous pigment particles to promote their metabolism, and stimulate the regeneration of subcutaneous collagen, thereby alleviating the appearance of pigmentation. It is recommended that patients with treatment hospitals to regular hospitals, and according to the extent of the condition under the guidance of professional doctors for targeted treatment, so as to effectively achieve the purpose of elimination.