Anal Thrombosis: Causes, Symptoms and Treatment
Anal thrombosis is a painful blood clot forming around the anal opening. It appears suddenly and is usually well treatable with simple measures.
Things worth knowing about "Anal thrombosis"
Anal thrombosis is a painful blood clot forming around the anal opening. It appears suddenly and is usually well treatable with simple measures.
What Is Anal Thrombosis?
Anal thrombosis (also called perianal thrombosis or anal vein thrombosis) is an acute condition in which a blood clot (thrombus) forms in the veins around the external anal opening. This leads to a painful, bluish-red swelling directly at the anal margin. Anal thrombosis should not be confused with hemorrhoids, although the symptoms can be similar. It is generally not dangerous, but very painful, and medical treatment is recommended.
Causes
Anal thrombosis occurs when blood flow in the small veins around the anus slows and a clot forms. Common triggers include:
- Straining during bowel movements, for example due to constipation
- Diarrhea with frequent bowel movements and irritation
- Prolonged sitting, such as desk work or long journeys
- Pregnancy and childbirth, due to increased pressure in the pelvic area
- Physical overexertion, e.g. intense cycling or weightlifting
- Increased venous pressure from other causes
In some cases, no specific trigger can be identified.
Symptoms
The typical signs of anal thrombosis include:
- Sudden, severe pain in the anal area, often present even at rest
- Visible or palpable swelling at the anal margin, usually bluish to reddish in color
- Pressure sensation and burning
- Pain when sitting, walking, or during bowel movements
- Occasional minor bleeding if the skin over the clot tears
Fever or general illness is not typical of uncomplicated anal thrombosis.
Diagnosis
Diagnosis is usually made by a physical examination. The doctor inspects and palpates the anal area. A proctoscopy (examination of the lower rectum) or further investigations are usually not necessary but may be performed to rule out other conditions such as hemorrhoids, anal fissure, or abscess.
Treatment
Conservative Treatment
In the first few days after onset, the following measures are available:
- Pain relievers (e.g. ibuprofen or paracetamol) to relieve discomfort
- Ointments and suppositories with anti-inflammatory or decongestant active ingredients
- Sitz baths with cool or lukewarm water for symptom relief
- Stool regulation through a high-fiber diet and adequate fluid intake
Surgical Treatment
If the anal thrombosis is very painful or large, a small surgical incision (incision and drainage) under local anesthesia may be performed. The clot is removed, which often results in immediate pain relief. The procedure is straightforward and has a low complication rate. In most cases, anal thrombosis heals completely within a few weeks.
Prevention
To prevent recurrence of anal thrombosis, the following measures are recommended:
- Adequate fiber and fluid intake to avoid constipation
- Regular physical activity
- Avoiding prolonged sitting without breaks
- Gentle anal hygiene
References
- Deutsche Gesellschaft für Koloproktologie (DGK): Guidelines on Proctology, 2023.
- Herold, G. et al.: Internal Medicine. Eigenverlag, Cologne, 2023.
- Jongen, J.: Anal Thrombosis. In: coloproctology, Springer Medizin, 2020.
Most purchased products
For your iron balance
Specially formulated for your iron balance with plant-based curry leaf iron, Lactoferrin CLN®, and natural Vitamin C from rose hips.
For your universal protection
As one of the most valuable proteins in the body, lactoferrin is a natural component of the immune system.
For Healthy Oral Flora & Dental Care
Formulated lozenges with Dentalac®, lactic acid bacteria, and Lactoferrin CLN®The latest entries
3 Posts in this encyclopedia categoryMorbus Wegener
What to do for otitis media
Strabismus
Most read entries
3 Posts in this encyclopedia categoryMagnesiumcarbonat
Calorie content
Cologne list
Related search terms: Anal thrombosis