What causes sudden tremors in left thumb without pain?
Patient: For the past few hours, my left thumb has been shaking when I bend it. There is no pain, and it seems to be excluded to just my left thumb. I ve been looking around for an answer, but I haven t been able to find one. Could someone please tell me what s wrong? Doctor: Hi,Dear you could be suffering from a condition known as writers cramps, its a focal dystonia. Such tremors usually are action dependent is they occur when u work, but if they are involuntary ie always present then Parkinson needs to be ruled out.You should consult a neurologist.