hi i am not a doc but that is some thing i have and it would be a good idea for you to get your doc to check for cubital tunnel [ its a pinched nerve in the elbow ] and it starts out like a tendinitis [ golfers or tennis elbow ] good luck
Tendinitis? Use Advil type meds for a few days to ease inflamtion. Ice if swollen heat if it feels better, or alternate. See doctor if it gets worse or lasts over a week. I am not in the medical field, I am just guessing. You can google your symptoms to see what matches.