Rectus Sheath Hematoma: Symptoms, Causes, Diagnosis, and Treatment
Updated: 2 days ago
Medically reviewed by Dr. Baraa Alnahhal, MD · Last reviewed: September 2026
TL;DR: A rectus sheath hematoma is a rare condition characterized by a collection of blood within the connective tissue (rectus sheath) that supports the abdominal muscles. It occurs when an epigastric artery or its branches rupture, often due to abdominal wall trauma, forceful coughing, or the use of blood thinners. The primary symptom is sudden, sharp abdominal pain, sometimes accompanied by a palpable mass. While most cases are mild and resolve on their own with rest and ice, severe instances, particularly in those with underlying health issues or taking anticoagulants, may require medical intervention like angioembolization or surgery.
Quick Answer
What is a rectus sheath hematoma? It is a collection of blood (hematoma) that builds up inside the fibrous sheath surrounding your “six-pack” muscles (rectus abdominis). This typically happens when a blood vessel in the abdominal wall is injured.
Key facts include:
Primary Symptom: Sudden, severe abdominal pain that worsens with movement.
Main Cause: Direct trauma to the abdomen or excessive force (like severe coughing).
Major Risk Factor: Use of blood thinners (anticoagulants) accounts for nearly 70% of cases.
Management: Approximately 80% of cases clear up with conservative care (rest, ice, and pain relievers).
Who it Affects: More common in females and individuals over age 60.
Symptoms and Clinical Indicators
The most distinct sign of a rectus sheath hematoma is sudden and persistent abdominal pain. The pain is often localized and can become sharp when the abdominal muscles are flexed. Because it can look like other causes of belly pain, it helps to understand the wider picture of when severe abdominal pain becomes a medical emergency.
Common Symptoms
Symptom | Description |
Abdominal Pain | Sudden, sharp, and persistent; worsens with movement or muscle contraction. |
Palpable Mass | A firm lump or swelling that can be felt in the abdominal wall. |
Bruising | Discoloration of the skin over the affected area (ecchymosis). |
Systemic Signs | Fever, nausea, vomiting, fast heart rate, or low blood pressure in severe cases. |
Causes and Risk Factors
Rectus sheath hematomas result from the rupture of an epigastric artery or its branches. The severity often depends on whether the bleeding occurs above or below the “arcuate line” in the abdomen.
Primary Triggers and Risks
Abdominal Trauma: Direct blows to the stomach or sudden, forceful strain.
Blood Thinners: Nearly 70% of patients are on anticoagulant medications. You can read more about modern blood thinners such as factor Xa inhibitors.
Chronic Kidney Disease: Approximately 60% of cases involve stage III or higher kidney disease.
Physical Strain: Forceful coughing, sneezing, or heavy lifting.
Medical Factors: Recent abdominal surgery, pregnancy, or steroid therapy.
Diagnosis and Management
Because its symptoms mimic other abdominal conditions, accurate diagnosis through imaging is critical.
Diagnostic Tools
Blood Tests: Measuring hemoglobin and hematocrit levels to check for blood loss.
Ultrasound: Often the first test used to visualize fluid collection in the abdominal wall.
CT Scan: A CT scan with contrast is the preferred method for identifying the exact location of the arterial rupture.
Management Strategies
Conservative Care: Rest, ice packs, and over-the-counter pain relievers (analgesics). Most hematomas resolve within 2 to 3 months.
Angioembolization: A non-invasive procedure to block the bleeding artery.
Surgery: Required in rare cases to remove the blood collection and repair the ruptured vessel.
Monitoring: Ongoing blood tests and ultrasounds to ensure the bleeding has stopped and to check for infection.
For further clinical reading, see Radiopaedia’s overview of rectus sheath hematoma imaging and the Merck Manual.
Frequently Asked Questions (FAQ)
Is a rectus sheath hematoma life-threatening?
Most cases are not dangerous and resolve on their own. However, in severe cases, especially for those on blood thinners, it can be fatal if not diagnosed early. The death rate is less than 2%.
How long does it take to heal?
Most hematomas disappear on their own within two to three months with proper rest and care.
Can I exercise with a rectus sheath hematoma?
You should rest and avoid strenuous activity, especially anything that strains the abdominal muscles, until your doctor clears you.
Why does it hurt more when I move?
Movement or flexing the abdominal muscles puts pressure on the rectus sheath and the collected blood, causing sharp pain.
What is the “arcuate line”?
It is a landmark in the abdominal wall. Below this line, the back part of the rectus sheath is missing, allowing blood to spread more easily into the abdomen.
Who is most at risk?
Females, people over 60, and individuals taking blood thinners or with chronic kidney disease are at the highest risk.
Can coughing really cause this?
Yes. Intense, forceful coughing can create enough pressure to rupture small blood vessels in the abdominal wall.
Will the lump go away on its own?
Yes, in about 80% of cases, the body reabsorbs the blood, and the mass disappears without surgery.
What is angioembolization?
It is a procedure where a doctor uses imaging to find the bleeding artery and then injects a material to block it and stop the bleeding.
Do I need antibiotics for a hematoma?
Not usually, unless the hematoma becomes infected, which your doctor will monitor through blood tests.
Is it the same as a hernia?
No. A hernia involves an organ pushing through a weak spot in the muscle, while a hematoma is a collection of blood from a ruptured vessel.
Can pregnancy cause a rectus sheath hematoma?
Yes, the physical changes and strain on the abdominal wall during pregnancy are known risk factors.
What should I do if I suspect I have one?
See a healthcare provider immediately for an evaluation, especially if the pain is sudden and severe.
Are there specific pain killers I should avoid?
If you are already on blood thinners, consult your doctor before taking any additional pain relievers like NSAIDs.
Can it happen again?
While not common, it can recur if the underlying risk factors (like trauma or high-dose anticoagulation) are still present.
Medical Disclaimer: The information provided in this article is for educational purposes only and is not intended as medical advice. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a medical condition. Never disregard professional medical advice or delay in seeking it because of something you have read here. If you think you may have a medical emergency, call your doctor or 911 immediately.
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