What Is A Thrombosed Hemorrhoid? Explained

A thrombosed hemorrhoid is a hemorrhoid that has a blood clot inside it. This happens when the blood supply to a hemorrhoid is cut off or slowed, causing blood to pool and clot. The result is a painful, hard lump near the anus that often appears suddenly and feels like a small grape or marble.

What Is a Thrombosed Hemorrhoid vs. a Regular Hemorrhoid?

All thrombosed hemorrhoids are hemorrhoids, but not all hemorrhoids become thrombosed. A regular hemorrhoid is simply a swollen vein in the lower rectum or anus. It may bleed, itch, or cause discomfort, but it is usually soft and not intensely painful.

A thrombosed hemorrhoid is different because of the clot. The clot stretches the tissue and triggers significant inflammation. This is why the pain is often described as sharp, throbbing, or severe — especially during the first 48 hours. The lump feels firm to the touch, unlike the softer feel of a non-thrombosed hemorrhoid.

There are two types based on location. An external thrombosed hemorrhoid forms under the skin around the anus and is the most common and most painful type. An internal thrombosed hemorrhoid forms inside the rectum and may not cause pain at all, but it can bleed or prolapse outside the anus.

What Causes a Thrombosed Hemorrhoid?

The exact trigger is often hard to pin down. The clot forms when pressure in the veins around the anus increases suddenly. Common contributing factors include straining during bowel movements, sitting for long periods, heavy lifting, and constipation.

Pregnancy is another frequent cause. The growing uterus puts pressure on the veins in the pelvis, which increases the risk of both hemorrhoids and thrombosed hemorrhoids. Childbirth itself can also trigger one due to the intense pushing and pressure.

Some research suggests that certain daily habits play a role. A diet low in fiber, chronic diarrhea, and spending too much time on the toilet all raise the risk. Being overweight or obese also increases pressure on these veins.

One important clarification: a thrombosed hemorrhoid is not a blood clot that travels to your lungs or heart. The clot stays within the hemorrhoid itself. It is painful and annoying, but it is not the same type of dangerous clot that causes deep vein thrombosis or pulmonary embolism.

What Does a Thrombosed Hemorrhoid Feel Like?

The hallmark symptom is sudden, severe pain. Many people describe the pain as peaking within the first 24 to 48 hours. Sitting, walking, or having a bowel movement can make it worse. The pain often feels worse than the appearance would suggest.

You will likely feel a firm lump at the edge of the anus. The skin over it may look bluish or purple because of the trapped blood. Some bleeding can occur, especially if the clot breaks through the skin, but this is usually minor.

Itching and a feeling of fullness or pressure in the anal area are common. Some people report that the area feels warm or irritated. If the hemorrhoid is internal and prolapses, you may feel a bulge that does not go back inside on its own.

Pain that continues to worsen after 48 hours, or pain accompanied by fever, chills, or heavy bleeding, warrants medical attention. These symptoms could point to an infection or a condition other than a hemorrhoid.

How Is a Thrombosed Hemorrhoid Treated?

Treatment depends on how painful the hemorrhoid is and when the pain started. The good news is that many thrombosed hemorrhoids resolve on their own. The body gradually reabsorbs the clot, usually over one to two weeks. The lump may shrink and become a skin tag that remains after the pain is gone.

For mild to moderate pain, home care is the first step. Warm sitz baths several times a day can help relax the muscle and improve blood flow. Over-the-counter pain relievers like acetaminophen or ibuprofen can reduce discomfort. Stool softeners or increased fiber intake help prevent straining, which allows the area to heal.

Topical creams and ointments containing hydrocortisone or witch hazel may reduce itching and inflammation. These products do not dissolve the clot, but they can make you more comfortable while your body heals.

For severe pain, a minor in-office procedure called incision and drainage may be recommended. A doctor numbs the area, makes a small cut, and removes the clot. This provides rapid relief, often within hours. However, this procedure is most effective when done within the first 72 hours of symptom onset. After that, the clot begins to break down on its own, and the procedure offers less benefit.

Surgical removal, called hemorrhoidectomy, is reserved for cases that do not respond to other treatments or for large, recurring thrombosed hemorrhoids. This is a more involved procedure with a longer recovery time.

When Should You See a Doctor?

You should see a doctor if the pain is unbearable, if you cannot sit or function normally, or if the pain does not improve after a few days of home care. You should also seek medical advice if you have heavy rectal bleeding, which is defined as bleeding that soaks through toilet paper repeatedly or produces bright red blood in the toilet bowl.

Fever, chills, or a feeling of general illness alongside a painful anal lump requires prompt evaluation. These symptoms are not typical of a simple thrombosed hemorrhoid and could indicate an abscess or another infection.

If you have a history of bleeding disorders or take blood thinners, consult a doctor before trying any treatment. Blood thinners can increase the risk of bleeding, and the management of a thrombosed hemorrhoid may be different in this situation.

Finally, any rectal bleeding should be discussed with a doctor, especially if you are over 45 or have a family history of colorectal cancer. Bleeding from a hemorrhoid is common, but it can also be a sign of more serious conditions. A doctor can help determine the cause.

Can You Prevent a Thrombosed Hemorrhoid?

Prevention focuses on reducing pressure on the veins in the anal area. The most effective strategies are dietary and behavioral. A high-fiber diet with plenty of fruits, vegetables, and whole grains keeps stools soft and reduces straining. Drinking enough water is equally important — fiber without adequate fluid can worsen constipation.

Avoid sitting on the toilet for prolonged periods. Do not strain during bowel movements. If you feel the urge, go promptly rather than waiting, because delaying can lead to harder stools and more straining.

Regular physical activity helps keep the digestive system moving and reduces pressure on the pelvic veins. If you sit for work, take breaks to stand and walk every hour. Avoid heavy lifting without proper breathing technique, as holding your breath while lifting increases abdominal pressure.

Maintaining a healthy weight reduces the pressure on the veins in the lower body. For pregnant women, side-lying positions and avoiding prolonged standing can help, though hemorrhoids during pregnancy are very common and not always preventable.

What Is the Recovery Timeline?

The worst pain typically lasts 2 to 3 days. During this time, the lump may feel hard and extremely tender. After the first 48 hours, the pain usually begins to subside even without treatment, as the body starts to break down the clot.

Most people feel significant improvement within one week. The lump itself may take longer to disappear. Over the following weeks, it may shrink and flatten. A small skin tag often remains where the hemorrhoid was. This skin tag is harmless and usually does not cause pain, though some people choose to have it removed for cosmetic reasons.

If you have incision and drainage performed, the pain relief is usually immediate. The wound itself may take a few days to heal. Keep the area clean and avoid straining during healing to prevent the area from reopening or becoming infected.