The only thing we can think of is, about 2 months ago our oldest boy bought a 1967 cougar and the alternator belt broke. Carl said that bolt felt like it was welded on,he had to use every thing he had to break the bolt loose. It started hurting after that. I finally got him to go to the doctor about 2 weeks ago. He tore the tendons at the elbow. It would probably be feeling alittle better by now but he has those days when it doesnt bother him so he does or lifts more than he should snd it goes back to hurting for a week. So he is limiting what I can do because I have to stay close to him to tell him he cant do that! Whatever that may be!