1, syphilis labs have two tests, RPR and TPPA, TPPA is a confirmatory test for syphilis, which is usually not false positive; RPR is a screening test for syphilis, which can be false positive, but the titer of the false positive will not be more than 1:4. If your first test is purely for RPR, then there is still a possibility of false positives.
2, it is possible that you because of other types of skin disease to the hospital, in order to rule out syphilis laboratory test of syphilis initial screening test, presented a false positive, the hospital in order to further confirm the diagnosis, two days later and let you laboratory test, this time to add a confirmatory test, the results of the laboratory test is negative, ruled out syphilis, the situation is still relatively common.
3, of course, does not exclude the hospital laboratory staff got the wrong specimen or operational errors caused by false positive, although it should not appear, but at least the final diagnosis is not a problem, the final results are still correct.
4, because the two results are not the same, so it is recommended that a month later, a third-party hospital to re-draw blood at the same time the two tests for syphilis, if still negative, there is no need to review the future, but I personally believe that the second test results.
5. Finally, I wish you good health and all the best!