This is Dr. David
if you have epilepsy, these shakes can be due to seizure activity.
you need to get an EEG brain wave test which will show if you are having seizures
there are anti-seizure medications which can help stop these seizures.
you are probably taking antiseizure medications, if you have epilepsy.
even anti-seizure medications can help with absence seizures.
have you had an EEG brain wave test during one of these shaking episodes?