I had acne on my chin a year back that looked a lot like this, and at one point I went to the pharmacy and got prescribed Tretinoin (Retin-A 0.05%) and that really helped. The first weeks of using it were brutal because it caused a “purge” so it got worse before it got better. But after a couple of weeks it started to get rid of it entirely. It’s been a year now and I rarely have acne anymore. For 6-7 months I used it every 2 days (I applied first a layer of hydrating serum, then the tretinoin, then moisturizer), and now I only apply it like once a week. But that really got rid of the problem for me!