Pain in the lower abdomen after intercourse, lower back pain, and increased leukorrhea - what illness is this?

Patient's question:

Detailed medical condition and consultation purpose: Abdominal pain, lower back pain, excessive white discharge
Medical history: Retroverted uterus, uterine erosion
Current general condition: This condition has persisted for several days.

Doctor's answer:

Hello:
For most couples, sexual activity is a source of physical and emotional pleasure, but many women experience pain during intercourse, viewing it as something to be avoided.
The characteristics of dyspareunia (painful intercourse) include: localized pain in the vagina or lower abdomen; severe and recurrent pain that often subsides several hours after intercourse; but sometimes pain may not appear until several hours after intercourse.
There are many causes of dyspareunia, and sometimes it can be due to the interaction of several factors. The main organic causes include retroversion of the uterus, cervical polyps, genital inflammation (such as vulvitis, vaginitis, pelvic inflammatory disease, etc.), pelvic tumors, endometriosis, hemorrhoids, vulvar lacerations, poor healing of episiotomy wounds, vulvar dryness, urethral papillomas, rigid hymen, or hymenolysis (hymen closure). These pathological factors need to be treated based on examination results. At the same time, psychological reassurance is also necessary, as even after organic conditions are resolved, mental tension can still affect sexual activity.
Some cases of dyspareunia are caused by allergic reactions. Some women are highly sensitive to semen and contraceptive devices such as vaginal and condoms. Upon contact, they may experience allergic reactions in the perineum or even throughout the body, which can lead to lower abdominal pain during intercourse. Changing contraceptive methods can gradually alleviate or eliminate the symptoms.
Sometimes, pain occurs when the male inserts himself into the vagina without adequate lubrication or with excessive force, causing pain. Alternatively, excessive force may increase abdominal pressure, affecting the movement of the uterus, bladder, and intestines, or even causing reverse peristalsis in the intestines, leading to spasmodic pain.