Twitching sensation feels like throbbing every body. comes and goes. is it ms or als ?

Twitching: Your symptoms do not sound like MS or ALS. Make sure you are drinking plenty of water, eating a well balanced diet with 3 meals per day, and getting enough sleep every night. If your symptoms continue, you need to see you physician. Good luck.

Doubtful for either: Your sensations are NOT diagnostic for either ALS or MS, and very nonspecific. You might inquire about a visit to a neurologist if your primary doctor cannot pin this down, but most likely, a relatively benign issue, and the intermittency is very reassuring.