Best way to describe where the pain im having is comng from is the elbo's arm pit. I did curls 2 days ago and christ it killing me every time i do a curl motion and release with no weight in my hand. Its not the bi or forearm- its inbetween. Whats hurt?
You've got a lot of small tears in the tendons that connect the muscles together at the joint. Right now it's filling with calcium and other materials to heal it which makes it very sensitive and stuff thus hurting to move it.
It's DOMS like any other my friend. If it happens every time you go for several times in a row then you're overdoing it and you need to tone it down.
"Years of hard work for only a single moment of perfection is a worthy trade." - Myself