What causes the urge to defecate after sexual activity?

Under normal circumstances, the main causes of defecation urges after sexual activity include pelvic congestion stimulation, muscle contraction effects, proctitis, prostatitis, and pelvic floor dysfunction. If discomfort occurs, it is recommended to seek timely medical evaluation and treatment at a正规 hospital. Specific analyses are as follows:

1. Pelvic Congestion Stimulation

During sexual activity, pelvic tissues become congested with blood, which may compress and stimulate the adjacent rectum, triggering the urge to defecate. After sex, lying down to rest for 15–20 minutes or taking a slow walk can help improve pelvic blood circulation and reduce this sensation.

2. Muscle Contraction Effects

Frequent contractions of abdominal and pelvic floor muscles during sexual activity may indirectly compress the intestines and accelerate intestinal motility, leading to a defecation urge. Deep breathing and relaxation techniques, or gentle clockwise abdominal massage after intercourse, can help relax the muscles and alleviate intestinal pressure.

3. Proctitis

When inflammation exists in the rectal mucosa, sexual activity can worsen mucosal congestion and edema, increasing rectal sensitivity and causing a defecation urge. Medications such as mesalazine enteric-coated tablets or sulfasalazine enteric-coated tablets may be used under medical guidance. Avoid spicy foods in daily life and maintain regular bowel movements.

4. Prostatitis

The prostate lies adjacent to the rectum. Inflammation causes the prostate to become congested and swollen; sexual activity may intensify this congestion, stimulating the rectum and inducing a defecation urge. Under medical supervision, medications such as levofloxacin hydrochloride capsules, Qianlieshutong capsules, or azithromycin dispersible tablets may be prescribed. Avoid prolonged sitting and perform warm water sitz baths 1–2 times daily.

5. Pelvic Floor Dysfunction

When pelvic floor muscles are weak or have impaired coordination, they may fail to return to normal after sexual activity, easily compressing the intestines and triggering a defecation urge. Mild cases may benefit from Kegel exercises to strengthen the pelvic floor muscles, while severe cases may require vaginal pelvic floor repair surgery. Under medical guidance, drugs such as Buzhong Yiqi Pills, midodrine hydrochloride tablets, or mecobalamin tablets may be used as adjunctive therapy.

In daily life, maintain proper hygiene before and after sexual activity; eat regularly and avoid overeating; exercise moderately to strengthen pelvic floor muscles; and seek prompt medical evaluation if recurrent urges to defecate occur, especially when accompanied by pain.