Genital herpes recurrence IgM test should be negative. IgM is a kind of antibody secreted by B-cells, its detection can be the immune function status of the body, when the human body is infected with the virus, the first to appear is the IgM antibody, so the detection of IgM level can be used as an early diagnostic indicator of infectious diseases. Serological examination can accurately determine the patient’s infection status, specific IgM antibodies appear 2 to 3 days after the first infection with herpes simplex virus, peaks in about a week, and then maintained for a period of time, after 8 weeks of infection IgM antibodies are basically undetectable. IgM antibody levels decline rapidly during the healing period and are undetectable during the incubation period, asymptomatic infections or recurrences. Ultimately, patients need to go to the hospital for standardized examination and treatment. Do not judge or diagnose on your own based on one test result, but consult a doctor in time, who will comprehensively analyze and make a clear diagnosis according to the specific situation.