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When a patient has external hemorrhoids, they will lie under the skin around the anus. They can become very itchy and may bleed. Sometimes, the blood may accumulate and form a thrombus (clot), which can be painful; the area will swell and become inflamed. External hemorrhoids are more likely to present with pain.
Thrombosed and ulcerated hemorrhoids cause rectal pain, bleeding, itching, and swelling. Itching Hemorrhoids. Itching in the anal region is a common symptom of hemorrhoids. In case of internal hemorrhoids, the mucous membrane of the anal canal secretes extra mucus that causes the itching.This mucus dries up in the anus and the surrounding region, thereby causing itching.tching Hemorrhoids. Itching in the anal region is a common symptom of hemorrhoids. In case of internal hemorrhoids, the mucous membrane of the anal canal secretes extra mucus that causes the itching. This mucus dries up in the anus and the surrounding region, thereby causing itching.