my thumb has twitched for about two weeks. when it started, it would twitch off and on all day. last 5 days, it would twitch maybe 4-6 times a day, but only a couple of twitches. yesterday, no twitch at all. today, i flew on a plane and it twitched slightly about 4 times. tonight, i lie in bed on my left side and my lft thumb twitched more than it has than in 10 days. i sat up and it stopped after about 2 minutes. what's up, pinched nerve? i tld my intern about it 10 days ago and he said to call him if it hasn't stopped in two weeks. i'm 49, just had a coplete physical and everything is in good shape. i work out 4-5 times a weeks and i'v lost 20 ponds in 10 weeks by cutting out bread, pasta, soft drinks.