A positive syphilis antibody but a negative titer suggests that the most common possibility is that the person has been infected with syphilis in the past, but at that time the amount of infected syphilis spirochetes was relatively small and their own resistance was relatively high, so they have been cured of syphilis by their own resistance. The current results suggest that the syphilis is already in the cure stage and does not need to be treated and does not cause transmission to others. This condition is very common in clinical practice, and many people are found through pre-operative checkups or marriage tests. The fact is that the normal fertility and surgical treatment is not a problem, so there is no need to panic.