My son, 56, diagnosed 7 years ago, suffered terribly with violent tremors and wild dyskinesia for the past few years. He was completely housebound, mostly bedridden, and suffered broken bones in dyskinetic falls. He was sent for discussion re: DBS 4 years ago, finally it was approved and bilateral surgery done a month ago. The generator was implanted 12 days after the first surgery, and he was turned on the next day. His levodopa/carbidopa dosage was kept the same, every two hours. First week was very good, second week less so, third week and ever since very bad tremors have returned for many hours a day, whole body shaking, hands pounding 6" up and down, head banging up and down on pillow that make me afraid something could be dislodged. They are saying it's because his disease is severe. I realize that, but most everything I've ever read including other patients' experiences say it works, is amazing, gives one back their lives, turned back the clock on their disease, etc. There's a stimulation system implanted in his brain. Some symptoms are quite a bit better, but not the tremors. Why? Thanks in advance for your input.