Do You know what that is? Its the scientific term for tennis elbow. Why am i talking about this? its a common injury from playing guitar. and after a year and a few months of playing i have it! it really pisses my off. Its from when you play and you tense you elbow it causes swelling and lots of pain. but there is a home remady for this! Its called R.I.C.E. Rest, ice, commpression, and elavation. rest it, put ice on it, press on it, put it above your head occasionly. sounds easy right? this will go on for a while and you also need to do wrist curls. stick you arm out and lift the weight with just you wrist on both sides of the arm.