In the early stages of Parkinson's disease, even an experienced neurologist can be quite difficult to diagnose this disease. There are no laboratory tests to help diagnose Parkinson's disease, so far yet. Your doctor should monitor the patient some time to reveal that tremor is constant and is related to other other classic symptoms of the disease. Due to the fact that other forms of parkinsonism may have similar features but different treatment, a very important point is how can early diagnosis of Parkinson's disease and initiate treatment.