There are five types of neurosyphilis, namely asymptomatic neurosyphilis, syphilitic meningitis, vascular syphilis, spinal syphilis, and paralytic dementia, each with different symptoms. 1. Asymptomatic neurosyphilis, in which pupillary abnormalities are the only signs, mainly manifested by the disappearance of the light reflex, but the presence of the regulatory reflex. 2. Syphilis, which usually develops within 1 year after syphilis infection, mainly affects young males with fever, headache, and cervical ankylosis as the main symptoms. 3. Vascular syphilis, which usually develops 5-30 years after infection. The neurological symptoms appear slowly or may occur suddenly, and the signs depend on the specific location of the occluded blood vessel, mainly hemiplegia, hemianesthesia, hemianopsia, and even aphasia. The age of onset is usually between 40 and 50 years. The common symptoms are memory loss, mental behavior changes, and later dementia, paralysis, and even seizures may occur. 5. The symptoms are mainly spinal cord symptoms, such as pins and needles or lightning-like pain in the lower extremities, sensory ataxia, and sphincter or sexual dysfunction, as well as urination and defecation abnormalities.