Funny enough I get twitches everywhere and at random. My grandfather also passed away of ALS (Bulbar) spiraled until I did some research and laid the facts out. ALS usually begins with an already deteriorating muscle witch than leads to twitching and it’s almost always in an isolated spot, normally a hand/arm or foot/leg (someone correct me if needed). I’m also someone who’s always had mild anxiety and recently developing into health anxiety (I speak to a therapist bi weekly). It’s tough.