Hemorrhoids are swollen veins in the lower rectum or anus, and how they appear depends on type and grade. Internal hemorrhoids, located above the dentate line, are usually painless but can bleed or prolapse. External hemorrhoids sit under the skin around the anus and may cause pain, itching, or swelling. Thrombosed hemorrhoids contain a blood clot and can look like a dark purple lump. Understanding common visual characteristics, likely locations, and stages helps people recognize when symptoms require medical evaluation and care.
