I woke up Thursday last week with a stabbing pain on the top left of my right bicep. I did not lift Wednesday. The only thing I think I did was start a gas trimmer for my wife on wednesday. The pain is not constant. It only "stabs" when I reach for my wallet or moving in a certian way. I have no blood under the skin. I have seen some photos of torn biceps and also tendon tears. I am 100% sure that my bicep is stil connected. I can press on the bicep and that does not hurt. Only certain movements trigger the pain it feels like a knife. I have been taking Motrin and resting. I plan on taking off a week from lifting this week. it is time to take a break for a week.