Re:Rash guards for BJJ
I get these and more too, it's the nature of the sport.
I have bought a long and short sleeve rash guard as I find it helps a little but I also like the compression as it helps with circulation and posture a little.
Worth noting that summer is almost here so be prepared to twice as hot when rollin, if you use the vest.
Masaru is a decent UK based company and i recommend the short sleeved one