What is the reason for the appearance of blood streaks a few days before menstruation?

Patient's question:

Is it related to sexual activity? First question supplement: 3 days

Doctor's answer:

What is the reason for blood streaks in leukorrhea before menstruation? Experts explain the causes:
1. Symptoms before menstruation: A few days before menstruation, clinical manifestations of leukorrhea with blood streaks may occur, usually lasting for about 1 to 2 days. This is a normal phenomenon in women, and at this time, it is important to prepare for the onset of menstruation.
2. Contact bleeding: Experts from Shanxi Huimin Hospital point out that contact bleeding refers to vaginal bleeding after sexual intercourse. Clinically, cervical diseases are the most common cause, such as cervical erosion, cervical inflammation, cervical polyps, etc. It is best to undergo relevant examinations and treatments at the hospital.
3. Causes of gynecological diseases: In addition to the aforementioned cervical diseases, it is also necessary to be alert to the possibility of vaginal inflammation, such as candidal vaginitis, bacterial vaginosis, trichomoniasis, etc. At the same time, the possibility of endocervical lesions should not be ignored.
4. IUD-related: Sometimes, improper use of an intrauterine device (IUD) can also cause leukorrhea with blood streaks.