Since My 61 Year Old Husband Fell Off Ladder 2

Since my 61 year old husband fell off ladder 2 years ago - subdural hematoma with full recovery - he has now begun to have tremors in right hand, stiff forearm, shoulder stiffness (all right side). No other symptoms. When he relaxes, he can get the shake to stop but tends to be very tight on that right side. He likes me to massage deeply & that relaxes & stops the shakiness, also.