Essential Tremors are different from twitches. For its none stop, continue even while asleep. Some have it and put it off as a disorder. Medication can mildly cure it, however through time the medication has to be increased to coincide with the brains electrical triggering causing the tremors in the first place. Second option is having a DBS (Deep Brain Stimulation) device similar to a pace maker installed. Had it attempted once it failed. The one time it shows really bad is when I get upset (mad) I shake violently, even my heart skips beats. As soon as it stops you better off running away fast I switch off mentally "Black Rage". I used to be able to control my anger where I would be aware but not driven by my anger, but I haven't worked on it for about 18+ years.