I didn t know that menstruation came to intercourse, and after ejaculation, I found that menstruatio

Generally, no. First of all, see whether the man is hygienic before having sex, such as having sex after cleaning, there will generally be no problem, and the discharge of menstruation itself is the flushing process, which is a self-protective physiological process for women. However, if the man is unhygienic, it is recommended to observe whether the vaginal discharge at the end of menstruation is different from before, or whether there is itching, and if so, it is recommended to go to the hospital for a general gynecological examination.

Wait until the menstrual period is over to see if you feel uncomfortable, if you are still uncomfortable, you should go to the gynecology department of a public tertiary hospital for a check-up, so that you can rest assured! Wishing you good health!