I’m experiencing some issues during cycling, this has been happening for a few years now but it has actually gotten better lately, but still not solved – lower saddle increased the severity of the issue, higher made it quite a bit better.
So what I believe is happening is that the edges of the chamois are being pressed between the saddle and my skin, causing skin irritation and some times “lumps” that feels like pimples.
I had something similar. Im still messing around with a total elimination of the problem but i improved it alot by lowering the nose of the saddle a tiny bit.
Im still going out on long rides with a multi tool and checking in every hour to mess with small adjustments to saddle height/setback/angle. I assume reach/stack and saddle choice play into it but thats as easy for me to change and test.