What are the reasons for irregular vaginal bleeding after intercourse?

Patient's question:

Irregular vaginal bleeding after intercourse, lower back pain, lower abdominal distension

Doctor's answer:

Generally speaking, vaginal bleeding outside of menstruation may be related to endocrine disorders or inflammation, such as vaginal ulcers, vaginitis, cervical erosion, acute or chronic pelvic inflammatory disease, etc. It may also be related to trauma, such as vigorous sexual activity, vaginal tearing during childbirth, or injuries, all of which can cause vaginal bleeding. Conditions such as uterine fibroids, cervical cancer, and endometrial cancer may also lead to irregular vaginal bleeding.
It is recommended to visit a hospital for a gynecological examination to identify the cause and receive timely, symptomatic treatment to avoid delaying the condition.