Muscle twitching in the absence of muscle weakness and wasting is not suggestive of a disease like ALS
Muscle twitching can be normal in people exposed to cold, exercise, certain medications, with pinched nerves, following certain viral infections, or as a benign syndrome with or without muscle cramps. In the benign form the twitching is generally more widespread as it seems in your case.
I cannot make a clinical diagnosis, so you should followup with your doctor or a neurologist
good luck
To the Doctor...
I frequently see fascilutations listed as being caused by exercise. I have recently been using one of those video game dance mats to loose weight, I stopped after my left calf started fascilutating really bad, and now my right calf is beginning. My father-in-law has ALS so I know what fasics... look like. My question is if caused by exercise how long do fasics typically last after you have stopped? (Mine have lasted about a month and a half now.) I figure since the exercising made my calves REALLY SORE the exercise was the source, but since they have not stopped, I am getting concerned.
Thanks!