What causes the feeling of rectal pressure and the urge to defecate without being able to pass stool?

Possible causes of anal fullness with difficulty in defecation may include: 1. Constipation: Dry and hard stools, along with prolonged lack of bowel movements, can lead to fecal buildup in the anal and rectal area, compressing the surrounding nerves and causing a sensation of fullness. 2. Hemorrhoids: Severe varicose veins in the anal and rectal area or frequent prolapse of hemorrhoids can cause displacement of the anal cushions, resulting in a feeling of anal fullness and affecting bowel movements. 3. Proctitis: Inflammation of the rectum continuously irritates the rectal mucosa, causing swelling and narrowing of the rectal lumen, which leads to difficulty in defecation. 4. Colorectal polyps: Polyps in the intestine can narrow the intestinal lumen, making it difficult for stool to pass. It is recommended to seek timely medical attention to determine the exact cause and choose appropriate treatment methods to prevent worsening of the condition.