First , the bottom of my left foot became tight and i cant seem to stretch it out.Then, the twitching started about 2 weeks ago while I was laying in bed, it is was in my left thigh and only lasted a few minutes. Then, I noticed the twitching again,but this time in several places -on backs of both arms,calves and thighs,also only lasting a few minutes. Now, the twitching and weakness are mainly on my left side and my foot hasnt improved. When I feel more stress the twitching begins again and i feel tired and a "sparking' sensation in my nerves. Are the ALS symptoms? Got a blood test and it is normal but no other test yet.