What are the tests to determine if you have Parkinson’s? Most of us have heard of Parkinson’s disease and have a vague understanding of its symptoms, but most patients do not know how to make a scientific diagnosis in the clinical setting, and thus do not know how to be examined in the hospital. In response to such questions from patients and their families, we will briefly describe the tests to determine the presence of Parkinson’s, so that patients can have a general understanding and be prepared. However, single photon emission computed tomography (CT) scan can show a significant decrease in dopamine transporter function in the brain of Parkinson’s disease patients, and positron emission computed tomography scan can show dopamine 2 receptor activity, which is very helpful for early determination. The dopamine transporter in the brain is mainly produced in the dense part of the substantia nigra of the midbrain. In Parkinson’s disease, the loss of dopaminergic neurons in the substantia nigra and the decrease in tyrosine hydroxylase activity are the main causes of dopamine reduction. The majority of Parkinson’s patients develop the disease after the age of 60. The onset of Parkinson’s disease is insidious, with a slow progression and gradual worsening. The main manifestations are: tremor, muscle tonicity, motor retardation, postural gait abnormalities, mouth, pharyngeal and palatal muscle movement disorders.