If you have mycosis vaginalis when you have intercourse, there are the following reasons: 1. It is possible that the male partner is also infected with mycobacteria in his genitals, but the symptoms are light and do not show up, so the process of intercourse will be brought into the female vagina, because the mucous membrane of the female vagina is damaged to varying degrees during intercourse and is easily infected by the germs, so it is recommended that both spouses go to the hospital at the same time and cooperate with the doctor to take local secretions for examination. It is also possible that women have poor immunity and are prone to mycobacterial infections. The occurrence of mycotic vaginitis.