Doctors Note Logo

Published on: 7/21/2026

What do hemorrhoids look like and what are the causes?

Hemorrhoids are swollen veins in the lower rectum or anus that can cause pain, itching, bleeding, or discomfort. Common causes include straining during bowel movements, chronic constipation or diarrhea, prolonged sitting, pregnancy, and a low-fiber diet. Hemorrhoids can be internal (inside the rectum) or external (under the skin around the anus), and while often mild, they can worsen without proper care.

Because rectal symptoms can overlap with more serious conditions, it's important not to guess. Take a free, instant, online symptom check to better understand what may be causing your symptoms and get clear guidance on your next steps—no signup required, and it only takes a few minutes.

Reviewed for medical accuracy: 07/20/2026

answer background

Explanation

Hemorrhoids are a common condition where veins in the rectum or anus become swollen and inflamed. They can be internal, located inside the rectum, or external, under the skin around the anus.

Causes of Hemorrhoids

  1. Constipation and Straining: Straining during bowel movements due to constipation is a primary cause of hemorrhoids. The increased pressure can lead to swelling of the veins.
  2. Prolonged Sitting: Sitting for long periods, especially on the toilet, can increase pressure on the veins in the anus and rectum.
  3. Other Factors: Additional risk factors include a low-fiber diet, obesity, and pregnancy, which can all contribute to the development of hemorrhoids.

Appearance

  • External Hemorrhoids: These can appear as lumps or swelling around the anus. They may be itchy or painful, and sometimes cause bleeding.
  • Internal Hemorrhoids: These are usually not visible but can cause bleeding during bowel movements.

Understanding these causes can help in preventing and managing hemorrhoids effectively by adopting lifestyle changes such as increasing dietary fiber intake and avoiding prolonged sitting. If you're experiencing symptoms and want personalized guidance, take our free AI symptom checker to better understand your condition and next steps.

(References)

  • Oberi IA, Omar Y, Alfaifi AJ, Ayoub RA, Ajeebi Y, Moafa SH, et al. (2023). Prevalence of Hemorrhoids and Their Risk Factors Among .... Cureus, 37885500.

  • Shafik A. (1981). Urethral discharge, constipation, and hemorrhoids. New .... Urology, 7269018.

  • Quijano CE, & Abalos E. (2005). Conservative Management of Symptomatic and/or .... The Cochrane database of systematic reviews, 16034920.

Thinking about asking ChatGPT?Ask me instead

Tell your friends about us.

We would love to help them too.

smily Shiba-inu looking

For First Time Users

What is Ubie’s Doctor’s Note?

We provide a database of explanations from real doctors on a range of medical topics. Get started by exploring our library of questions and topics you want to learn more about.

Was this page helpful?

Purpose and positioning of servicesUbie Doctor's Note is a service for informational purposes. The provision of information by physicians, medical professionals, etc. is not a medical treatment. If medical treatment is required, please consult your doctor or medical institution. We strive to provide reliable and accurate information, but we do not guarantee the completeness of the content. If you find any errors in the information, please contact us.