Judging from your photos, it's a scar left by acne. This kind of scar treatment is more difficult. You can use topical ointment to remove scars, or you can inject hormones locally to soften and fade scars. But you can't use too much hormone, otherwise there will be side effects. In addition, you can't do cryotherapy, which will make the scar bigger.

(Dr. Tan Zhijian solemnly reminds me that because I can't see the patient face to face, I can't fully understand the condition. The above suggestions are for reference only. Please go to the hospital for specific diagnosis and treatment under the guidance of a doctor! )

Wuhan union hospital Tan Zhijian/