This may be totally off the wall, but hubby has a condition that is similar-sounding. He has a recurring tick that causes him to tense and roll his left arm now and then and flex his thumb and finger on that hand. Occasionally, he'll have a spate of tickiness that is enough to irritate the tendons in that arm and cause some soreness, but otherwise its a benign condition. I can't remember what it's called...
"We are--each of us--dying; it's how we live in the meantime that makes the difference."
"It's not what you gather, but what you scatter that tells what kind of life you have lived!"
"Be kinder than necessary, for everyone you meet is fighting some kind of battle."