A spinal epidural hematoma is a collection of blood between the dura and the walls of the spinal canal. It may rapidly compress the cord or nerve roots after a procedure or injury, or sometimes without an identifiable triggering event.
Blood in a confined space
Even when nervous tissue is initially intact, the accumulating blood can exert dangerous pressure. Possible settings include surgery, spinal procedures, trauma and a clotting disorder. Anticoagulant medication can increase risk, but the absence of such medication does not exclude a spontaneous hematoma.
Recognizing the emergency
Sudden neck or back pain followed by weakness or sensory loss requires immediate emergency assessment. Urinary retention, saddle numbness or loss of bladder or bowel control requires the same response. After a procedure, any new neurological deficit should also be reported immediately to the treating service.
Investigations
Urgent MRI identifies the collection and its compressive effects. Assessment includes clotting tests and a review of medication. Clinicians distinguish abscess, disc herniation, spinal cord infarction and other causes of acute neurological dysfunction. Temporary improvement is not a reason to abandon assessment of a concerning presentation.
Treatment and outlook
Compression accompanied by neurological deficit often requires urgent surgical evacuation. Hospital-supervised correction of a clotting abnormality may also be necessary. Observation without surgery is reserved for selected cases with close monitoring. Outcome depends partly on neurological status before treatment and how promptly the problem is managed.
Role of TAGMED care
Suspected spinal hematoma requires immediate hospital referral without manipulation or traction. TAGMED cannot evacuate the blood collection. After stabilization, functional support is considered only with medical clearance. Anticoagulant treatment must never be changed independently in response to this information or a routine care appointment.
Frequently asked questions
Is this a bruise in a back muscle?
No. The blood collection lies inside the spinal canal.
Does it require a previous injury?
No. Spontaneous cases can occur.
Does taking no anticoagulant exclude it?
No. Other mechanisms may cause bleeding.
Can pain precede weakness?
Yes. Symptoms can progress rapidly as compression increases.
Can assessment wait until tomorrow?
Not with a new neurological deficit, urinary retention or other new sphincter warning signs.
Conceptual diagram: neurological deterioration requires immediate assessment.
Medical references
- Acta Neurochirurgica — original research. Clinical outcome after surgical management of spontaneous spinal epidural hematoma.
- World Neurosurgery — original research. Spontaneous Spinal Epidural Hematoma: A Surgical Case Series of Ten Patients.
- HSS Journal — original research. Symptomatic Epidural Hematoma after Elective Posterior Lumbar Decompression: Incidence, Timing, Risk Factors, and Associated Complications.
References document the topic; their inclusion does not imply endorsement of TAGMED services by those organizations.
Educational information from The Spine Page. This entry does not replace an individual assessment. Documentary version: October 12, 2026. Sylvain Desforges, B.Sc., D.O., N.D., osteopath and naturopath.
TAGMED clinic contact details
These contact details do not replace emergency care. For severe or rapidly progressive symptoms, go to an emergency department; call 911 when needed.
Clinique TAGMED — Terrebonne
1150, rue Lévis, Suite 200
Terrebonne (Québec) J6W 5S6
450‑704‑4447
Clinique TAGMED — Montréal
1140, avenue Beaumont
Mont-Royal (Québec) H3P 3E5
1‑877‑672‑9060