Thank you DrVinod
But is it unlikely to have ALS after 19months of twitching with no weakness?
Benign fasciculation syndrome (BFS) is a neurological disorder characterized by fasciculation (twitching) of various voluntary muscles in the body. The twitching can occur in any voluntary muscle group but is most common in the eyelids, arms, legs, and feet. Even the tongue may be affected. The twitching may be occasional or may go on nearly continuously. Any intentional movement of the involved muscle causes the fasciculations to cease immediately, but they may return once the muscle is at rest again.
Though twitching is sometimes a symptom of serious diseases such as spinal injury, muscular dystrophy, Lyme Disease, multiple sclerosis or amyotrophic lateral sclerosis (ALS), it is much more often due to more benign causes (BFS, over-exertion, etc), and virtually everyone will experience some episodes of benign fasciculation during their lifetime.
Do not self diagnose and let your neurologist diagnose your case, self diagnosis will lead you into depression. Take care!