If it's where I'm thinking, it's actually your tendon/legiment assocaited with your tricep. I too have had this pain. I think I initially got my from benching or doing cleans, but they say you shouldn't do any exercises where your triceps are stretched during your lift (skull crusher, overhead extensions, etc.). I've also found that joint supplements helped me out as this was nagging me for about a month prior to jumping on Animal Flex. That got rid of the pain for me.