I ended up with a welt that swelled up so much I had to bandage it.
My mom is considering getting me those types of 'smoother' arm guards... they strap, like, right to the arm with no openings anywhere.
I often get in the bad habit of sorta bending my arm while doing archery... maybe that's the same problem you are getting?
Try straightening out our arm straight out so that your elbow faces directly to the side, and doesn't point downwards or anything. That way, there is a smaller chance of the bowstring hitting you. It may feel weird doing it at first, but it's just a muscle you may need to practice.
























