The characteristic oily skin in individuals with parkinsonism has long been observed by clinicians. The oiliness seems to be associated with periods when the disease is most active. This seborrhea has been observed particularly in post-encephalitic parkinsonism, as well as in idiopathic paralysis agitans. It also occurs in phenothiazine-induced parkinsonism.
临床医生早就观察到帕金森病患者有油性皮肤这一特征。这种油性似乎与疾病最活跃的时期有关。这种脂溢性皮炎尤其在脑炎后帕金森病以及特发性震颤麻痹中被观察到。它也发生在吩噻嗪诱发的帕金森病中。