Why might I experience a feeling of fullness in the anus?

Reviewed by Yoshinori Abe, MD

Internal Medicine

A feeling of fullness in the anus is often caused by hemorrhoids, an enlarged rectum, or an anal fissure. These conditions create pressure, swelling, or irritation in the anal canal, which produces the uncomfortable sensation of fullness, heaviness, or incomplete emptying after a bowel movement.

Because these causes share overlapping symptoms but require different treatments, identifying the right one matters. A free, instant, online symptom check can help you narrow down possible causes in minutes, understand how urgent your symptoms may be, and guide your next steps—whether that's home care or seeing a doctor.

Reviewed for medical accuracy: 07/15/2026

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Explanation

When you feel full in your anus, it might be because something is pressing on or stretching the tissues there. One common reason is enlarged hemorrhoids. These are swollen blood vessels in the anus that can cause a bulge and make you feel full or uncomfortable.

Another possibility is that the rectum—the last part of your large intestine—might be enlarged or holding more content than usual. This extra filling in the rectum can send signals that feel like fullness in the anus, even when there isn't a problem with the muscles themselves.

A third cause can be an anal fissure, which is a small tear in the lining of the anus. This tear can cause pain or a feeling of pressure when the skin is stretched. Remember, if the sensation is bothersome or lasts for a long time, you can check your symptoms with our free AI symptom checker to better understand what might be causing your discomfort and whether you should see a healthcare provider.

(References)

InformedHealth.org [Internet]. Cologne, Germany: Institute for Quality and Efficiency in Health Care (IQWiG); 2006-. Overview: Enlarged hemorrhoids. [Updated 2021 Dec 9]. Available from: https://www.ncbi.nlm.nih.gov/books/NBK279467/
Verkuijl SJ, Trzpis M, Broens PMA. Normal Rectal Filling Sensations in Patients with an Enlarged Rectum. Dig Dis Sci. 2019 May;64(5):1312-1319. doi: 10.1007/s10620-018-5201-6. Epub 2018 Jul 12. PMID: 30003387; PMCID: PMC6548060.
Updated 2022 Nov 14]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from: https://www.ncbi.nlm.nih.gov/books/NBK526063/

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