What Is a Thrombosed External Hemorrhoid?

External hemorrhoids form when pressure builds in the veins near the anus. If that pressure suddenly spikes - from straining during a bowel movement, lifting something heavy, or even coughing - a small vein can rupture internally, trapping blood inside and forming a clot.

This clot (thrombus) stretches the surrounding tissue and nerves, which is what causes the sharp pain. Even though it can be very uncomfortable, the condition is self-limiting and usually resolves over time or with proper treatment.

Factors that can increase your risk include:

• Chronic constipation or diarrhea
• Pregnancy and postpartum changes
• Prolonged sitting or heavy lifting
• Low-fiber diets that make stools harder to pass

A thrombosed external hemorrhoid typically appears as a hard, purplish-blue lump near the anus. Symptoms often include:

• Severe pain or tenderness, especially when sitting or during bowel movements
• Visible swelling or a firm lump around the anus
• Mild bleeding if the overlying skin splits or ruptures
• Itching or irritation as the area heals

The pain tends to peak within the first 48–72 hours and then gradually improves as the clot begins to shrink.

A proctologist can diagnose a thrombosed external hemorrhoid with a quick visual and physical examination. The best treatment depends on how recently symptoms began and how severe the pain is.

• Early treatment (within 48–72 hours) - A simple in-office procedure can remove the clot under local anesthesia, providing nearly instant relief.
• After several days - Once the pain starts improving, the clot often reabsorbs naturally. Warm sitz baths, gentle cleaning, and anti-inflammatory creams can help.
• Lifestyle changes - Increasing fiber, hydration, and healthy bowel habits can prevent future flare-ups.

While home remedies can ease discomfort, professional treatment ensures the clot is properly addressed and complications are avoided.

If you experience sudden, severe anal pain or notice a hard lump that wasn’t there before, it’s best to see a proctologist right away. Early treatment can dramatically reduce pain and speed up recovery. Even if the pain improves on its own, follow-up care helps prevent future thromboses and keeps your recovery on track.