When Parkinson’s patients keep uttering, it may be due to the combination of diseases, such as upper respiratory tract infection, etc., and other diseases, such as mental retardation and mental abnormality. 1. Combination of other diseases: Parkinson’s patients have other diseases that cause discomfort, such as upper respiratory tract infection, pneumonia, osteoarthritis, gastroenteritis and so on. 2. Intelligence loss: Parkinson’s disease patients may be accompanied by intelligence loss, which is manifested as memory loss, decreased ability to calculate, slow response, and so on, and may have the symptom of giggling all the time. 3. Mental abnormality: Parkinson’s patients may have mental abnormality in the middle and late stages of the disease, and then the patients may also have the symptom of giggling all the time. Parkinson’s patients can go to the hospital to consult with specialists and be treated under the guidance of doctors.