The first choice to check syphilis hanging dermatological venereal disease, if the hospital does not have dermatological venereal disease, but also according to the patient’s own symptoms and the hospital’s specific subsections to choose departments for examination, such as gynecology, male, neurology, etc. 1, dermatological venereal disease: syphilis early more prominent feature is the skin mucous membrane damage, once the patient appears skin mucous membrane damage, preferred dermatological venereal disease. The most common skin damage is syphilis rash, which is also a characteristic manifestation of second-stage syphilis. The rash can cover the skin and mucous membrane of the whole body, manifesting as red or reddish-brown rash, papules, etc. Some skin ulcers and pustules may even appear. The main site of invasion is the external genitalia, and some men are commonly found in the penis, coronal sulcus and glans prepuce, so they can choose to hang the male department for examination; 3. Sometimes some patients also go to the psychiatric department first because of psychiatric symptoms.