If you have abdominal pain with obvious bowel movements and no obvious stool, consider rectal irritation, such as pelvic effusion, secondary to pelvic infection, the patient will also have fever and symptoms of urinary tract irritation, ultrasound examination can also further confirm the diagnosis, female patients are more frequent, especially retrograde infection. In addition, in patients with abdominal infections, the fluid in the abdominal cavity also flows easily into the pelvis, especially after primary abdominal infections, patients with appendicitis, and patients with gastroenteritis are prone to secondary fluid accumulation. Patients with severe infections can cause pelvic effusion, and the common symptoms are rectal irritation, a feeling of urgency, or even severe fever and chills, etc. If necessary, further surgical treatment with incision and drainage is required.