In Parkinson's disease, there are two main types of clinical manifestations. One is motor symptoms associated with damage to the dopaminergic system, and the other is non-motor symptoms related to damage of non-dopaminergic systems. The non-motor symptoms include olfactory dysfunction, sleep disorders, mood disorders, as well as cognitive and psychiatric behavioral disturbances. Additionally, there are dysfunctions of the autonomic nervous system, which manifest in the gastrointestinal tract mainly as constipation, and in the urinary system as urinary incontinence, urinary frequency, urinary retention, and sexual dysfunction. There also occurs orthostatic hypotension, along with changes in the skin. Some patients may experience abnormal increases or decreases in sweating and abnormal secretion of sebum in the facial area, which are specific skin symptoms of Parkinson's disease.