Why do I bleed after sex?

Do you encounter some problems when having sex, and don’t know what to do after the problem occurs? For example, there is blood after having sex. In fact, in most cases, there is blood in the leucorrhea. When you encounter such a situation, you should go to the hospital for examination and treatment immediately. Next, let’s talk about why this happens.

Western medicine believes that the vaginal environment is often unstable due to the host's metabolic products, the bacteria's own products and exogenous factors (sexual intercourse, douching and other interference). The vaginal flora is very complex. In addition to protozoa and fungi, it also includes many aerobic and anaerobic bacteria. These microorganisms can be divided into commensal and pathological ones. They all grow in a common environment and there may be antagonism between the microorganisms.

Another factor that affects its growth is the hydrogen ion concentration. At pH 3.8~4.2, it is conducive to the reproduction of commensal bacteria, especially Lactobacillus, which is the main species in a healthy vagina. The density in vaginal fluid can reach 105~108ml. When the vagina is infected by microorganisms, if Lactobacillus is dominant and can still maintain pH 3.8~4.2, it will not cause disease. Moreover, Lactobacillus can also produce H202, which is toxic to other microorganisms and inhibits their reproduction. Others such as Streptococcus lactis, Enterobacter, Proteus, Gavagelococcus, and Veillonella are common in the lower end of the vagina and usually do not cause symptoms. The vaginal flora restrain each other, preventing pathological bacteria from having any effect. If this balance is disrupted, the mutual restraint disappears, so the hydrogen ion concentration decreases, lactobacilli lose their advantage, and pathological bacteria are able to multiply, resulting in symptoms.

Bacterial vaginosis is a mixed infection caused by a decrease in lactobacilli in the vagina and a massive proliferation of other bacteria, mainly Gardnerella, various anaerobic bacteria and mycoplasma.

So it is because of the influence of these bacteria that bleeding after intercourse may occur. In fact, it is an infection problem, but you don’t have to worry. As long as you go to the hospital for treatment as soon as you find the problem, but don’t think that it is nothing and then don’t go for treatment. This is irresponsible to your body. I hope everyone can pay attention to this.