What is the reason for a small amount of bleeding after intercourse?

Patient's question:

Patient Gender: Female
Detailed Condition and Purpose of Consultation: Hello! A week ago, after having sex with my boyfriend, I noticed some brown discharge, which was likely a small amount of blood. The next day, I went to the hospital for a check-up. This was my first time going to the hospital for an endocrine check-up, so I was very nervous. The doctor examined my lower abdomen and said it was cervical inflammation. They prescribed Baofukang Suppositories for me. However, after using them for a few days, I noticed a few small blood streaks in my urine. Could you please explain why this is happening? Thank you.
Duration of Current Illness: One week
Current General Condition:

Doctor's answer:

Bleeding after sexual intercourse is a common symptom of gynecological diseases, and there are generally the following reasons:
1. Cervical cancer - Sexual intercourse bleeding is often a warning sign of early cervical cancer, with bleeding being light in amount and bright red.
2. Cervical polyps - When polyps become edematous, necrotic, or infected, their appearance resembles early cervical cancer, making them prone to cause bleeding during intercourse.
3. Cervical erosion - Cervical erosion is the most common manifestation of chronic cervical inflammation. The cells in the eroded areas are easily shed and thin, so some cervical erosions can also lead to bleeding during intercourse.
Additionally, vaginitis, vaginal wall abrasion, and submucosal uterine fibroids can all cause bleeding during sexual activity.
If menstrual abnormalities occur, a woman may think her period has ended but engages in premature intercourse, leading to uterine contractions under sexual stimulation. The residual blood in the uterine cavity is then expelled through the vagina.
Furthermore, some women may experience bleeding during ovulation. If a gynecological examination reveals no abnormalities in the vagina or cervix, these possibilities should be considered.
In summary, almost all cases of bleeding during intercourse indicate a gynecological condition. It is important to seek medical attention for a checkup.