Syphilis is usually detected by a test strip as soon as two weeks or as long as three months after infection. Syphilis cannot be detected immediately after infection, because there is a certain incubation period after infection, with the gradual production of syphilis antibodies, it is possible to be detected by the test paper, some people can detect syphilis antibodies in about two weeks relatively quickly. In some people, the incubation period for syphilis is longer, up to three months. In this case, it can take up to three months after infection for the test strip to be positive for syphilis. Therefore, patients with a high-risk history of syphilis infection who are not detected in about two weeks are advised to be tested at one month or three months, which can be done using test strips. It is usually recommended that patients with high-risk sexual behavior suspected of syphilis in addition to the use of test strips to detect, but also in the infection to the regular hospital, under the guidance of the doctor regular serological examination of syphilis, if all negative, so as to be able to rule out syphilis.