I've been skin brushing for eons, but I have to admit I haven't had that type of reaction, or heard about it before. However, I see the post below yours also addresses causing pain after skin brushing, so you aren't the only one!

I am a massage therapist, and it is a fact that some people can be quite sore the 24 hrs following a massage, particularly if they don't drink enough water. In massage, we regarded the treatments as having 'released toxins' from the lymph and tissues and they need to be removed/excreted from the body.

With that said, all I could suggest is to increase your water intake. If you can manage some self-massage of the areas, that could help work things out quicker than if you just wait for time to pass. I would assume you're a good judge of your own body so if there is nothing that seems to need medical attention, I wouldn't worry.
But, of course, if the soreness continues and seems abnormal, I would get it checked out.

Sorry, totally didn't notice that the post was 68 days old!

I'd be curious to know how things worked out for you with the skin brushing soreness.