Why is syphilis detected in the elderly more, in the clinic also did encounter these situations, analysis of the situation for the following reasons: 1, the majority of syphilis detected in the elderly for recessive syphilis, and late-stage recessive syphilis because there are no obvious symptoms are not easily detected. If there was a history of smut years ago, but no dominant symptom manifestation was not detected, and later in the middle may have used any antimicrobial agent to suppress the disease due to other diseases, how many years later the syphilis was found only after hospitalization and surgery again. 2, individual elderly people such as very few cancer and malignant tumor patients or very few patients with immune system diseases can have a false positive syphilis reaction, and this situation needs to be identified The main two cases are these because a false-positive syphilis reaction cannot be considered as true syphilis.