I also get acne, and then leave a black mark.
I recommend you to try lavender essential oil, which has a good effect. After 3 days, the acne marks will be gone.
Furthermore, when you have acne, don't squeeze it, which is not good for your skin.
In the early stage of acne, if it is inconvenient to apply aloe vera, it will gradually decrease.
Aloe vera gel can also be extracted from the market.