Nausea and dizziness are less common symptoms of Parkinson's disease, which primarily manifests through tremors in the limbs and head, along with paralysis symptoms such as unstable walking, lack of mobility in walking, unstable gait, and abnormal walking posture. Other non-motor symptoms may include poor sleep, depression, anxiety, and weakness. If nausea and dizziness are present, Parkinson’s disease is generally more common in elderly people and may be due to insufficient cerebral blood supply or complications such as cerebral infarction, cervical spondylosis, and high blood pressure. These causes should be ruled out before considering Parkinson's disease. While Parkinson's disease itself seldom leads to nausea and dizziness, these symptoms can also be side effects of the medications used to treat Parkinson's disease.