The main symptoms of Parkinson’s disease include resting tremor, bradykinesia, muscle rigidity, postural instability, autonomic dysfunction, sensory disturbances, depression and anxiety. Resting tremor is probably the earliest manifestation of Parkinson’s disease, which often occurs when the fingers or limbs are in a particular position and disappears when changing positions or during sleep. In addition, Parkinson’s disease may also present with the following symptoms: inflexibility and stiffness in one limb, gradually extending to the extremities and trunk. The facial expression gradually decreases and becomes dull. Difficulty in starting when walking, leaning forward, small broken gait, and difficulty in turning around. At this point, it is important to consult a neurologist for further treatment. Of course, there is no need to worry too much, as tremor in the limbs is not always Parkinson’s disease. There is another type of tremor called idiopathic tremor, which is an involuntary tremor of the head, jaw and limbs with variable frequency, without symptoms such as bradykinesia or limb stiffness. Tremor can also occur in hyperthyroidism and is characterized by fine tremors of the limbs with a faster frequency, accompanied by symptoms such as excessive food and hunger, weight loss and excessive sweating and fear of heat. The symptoms of Parkinson’s disease can also be distinguished by overdosing on drugs such as reserpine, chlorpromazine and haloperidol, which can also cause Parkinson’s-like symptoms, but disappear when the drugs are stopped.