I found out I had my period after sex.

Girls should strictly know their menstrual cycle and have a basic understanding of the safe period and the dangerous period. Although there is no clear boundary between the safe period and the dangerous period, the body's condition can still be monitored. Some people may experience vaginal bleeding due to excessive movements during sexual intercourse. First of all, we need to clarify the cause of the blood and do not treat it blindly. So, what happened if you found that you had your period again after having sex?

1. Cause inflammation and lead to gynecological diseases. During normal sexual intercourse, the penis will bring bacteria to the vagina, but the acidic environment in the vagina is not conducive to bacterial reproduction and will eliminate the bacteria. During the menstrual period, the acidic environment in the vagina is diluted due to the discharge of menstrual blood, and the resistance is weakened. Because the blood is rich in nutrients, bacteria can multiply in large numbers. During menstruation, the endometrium sheds to form a wound, and the cervix is ​​also slightly dilated. These pathogenic "group bacteria" swarm upward, pass through the cervix, enter the uterine cavity, and multiply in large numbers on the wound surface of the uterine cavity, which can easily cause vaginitis, pelvic inflammatory disease, metritis, etc., bringing disease and pain to women.

2. Cause infertility or ectopic pregnancy. When having sex during menstruation, the negative pressure created during intercourse causes a large number of pathogens to be "sucked" into the fallopian tubes. Pathogenic bacteria multiply in the fallopian tubes, causing salpingitis, which causes swelling, necrosis, and suppuration.

3. Aggravate the discomfort symptoms during menstruation. When menstruation comes, the endometrium bleeds, part of the endometrium ruptures and falls off, and some blood vessels are opened and exposed. At this time, sexual intercourse will increase the menstrual volume due to local stimulation, and will also cause heaviness and pain in the lower abdomen. At the same time, it will prolong the days of menstruation and aggravate the discomfort symptoms of menstruation.

4. The production of antibodies leads to infertility. How are antibodies produced? This is related to the immune response in our body. When a foreign object enters the human body for the first time, our body is unprepared for it and it can penetrate straight into it. When it damages the body, the immune system produces antibodies that have the ability to recognize and kill. When it invades again, the antibodies are activated and they fight the invader with all their might, excluding it and killing it even if it enters the human body. The BCG and hepatitis vaccines we inject inject a small amount of bacteria or viruses that are not enough to cause the disease into the human body, allowing the body to produce antibodies. When they invade again, they will be eliminated, thus preventing illness. But sometimes, our immune system makes mistakes. Because it is too vigilant, it often regards some things that do not harm the body and are useful to us as "invaders", produces antibodies, and kills them as "enemies" when they come again.