I was treated 4 weeks ago and there are LOTS of stuck pepper spots on shoulders and upper back. I can squeeze them, similar to a zit and they come out. Other than that is it normal? Does it indicate anything about quality of the treatment? 18mm 16J 3msec. Thanks!
It is normal. I am experiencing the same thing. The dead hairs just have to make their way to the surface- this will take some time.
Pepper spots are dead hairs, so it most likely indicates that the treatment was successful on those hair! 
Also, it took a really long time for the redness to wear and the skin to look normal again. Around 2-3 weeks. Does that mean I need to try a different laser?
Pepperspots are dead hairs and are normal for some people on certain areas. Exfoliating helps.
Redness for more than a few days isn’t normal.
So the redness lasting longer than a few days means it’s the wrong laser? What am I supposed to infer from your statement? Thanks for clarifying!
It means the settings were too high and either you need slightly lower settings (only slightly since there was no burn) or a different laser type.
Redness was there for 2-3 weeks? Do you have photos?