Hello, syphilis antibody is positive, you can't turn negative. Syphilis antibody is an antibody obtained by infecting syphilis. If you can't turn negative after treatment, you will turn positive for life. Syphilis should be checked regularly within 2 years after treatment. Most of them can turn negative after treatment, and a few people have not turned negative after formal treatment. This is called serum fixation, so it is uncertain whether they can turn negative.