Do you have any feeling of anxiety? I ask as anxiety can cause them and there are meds to control it. I don’t recommend as the medicine is very addictive.
But there is very benign medicine to control shaking body and hands. I have used it and it is very effective.
I have no more anxiety than the average person, I believe. And the shaking is all internal. I don’t think it’s caused by stress because it’s just as bad on the weekends as it is on the workdays.