You hit your head. Days later, the headache won’t quit.
That’s a common story. Head injuries don’t always show symptoms right away. Sometimes pain builds slowly. Sometimes it lingers for weeks.
Here’s the problem: not every headache means brain damage. But some do. And you can’t tell the difference by how it feels.
This article explains when a headache after a head injury needs imaging, why neurologists in Orlando lean on MRI, and what to expect from a head injury MRI at Clearview Diagnostic.
Quick answer: If your headache follows a blow to the head and comes with confusion, vision changes, repeated vomiting, worsening pain, or symptoms that don’t improve after 48 hours, ask your doctor about a head MRI. MRI shows soft tissue detail that CT scans and X-rays miss, making it the preferred tool for evaluating the brain after the acute injury window has passed.
Understanding Head Injuries and Post-Injury Headaches
A head injury covers a wide range, from a mild bump to a serious traumatic brain injury (TBI). Every year, TBIs are tied to more than 69,000 deaths in the United States, or roughly 190 people per day, according to the CDC. Falls alone account for nearly half of all TBI-related hospitalizations.
Most head injuries are mild. Most headaches that follow them resolve on their own. But some headaches are warning signs.
Not every MRI for headaches follows an obvious injury, either. Some patients develop new or worsening headaches weeks after a minor bump they barely remember. Others never recall hitting their head at all, yet their headache pattern still matches red-flag criteria. In both cases, imaging is what separates a routine headache from one that needs a neurologist’s attention.
Key components of a post-injury workup include:
- Symptom timeline. When did the headache start? Is it getting worse?
- Neurological signs. Confusion, slurred speech, weakness, or vision changes matter.
- Injury mechanism. A fall from height or a car accident raises concern more than a minor bump.
- Imaging findings. This is where MRI becomes essential.
Common Symptoms That Follow a Head Injury
- Persistent or worsening headache
- Dizziness or balance problems
- Sensitivity to light or noise
- Trouble concentrating or remembering things
- Nausea or vomiting
When a Headache Signals Something More Serious
Not every post-injury headache is routine. According to the American College of Radiology’s imaging guidelines, red-flag symptoms that warrant imaging include a sudden, severe headache that peaks within minutes, headaches tied to fever or a neurological deficit, new or worsening headache patterns, and any headache with a post-traumatic onset. Age over 50 and a history of cancer or immune problems raise the stakes too. When any of these apply, imaging isn’t optional. It’s how a neurologist rules out bleeding, swelling, or structural injury.
Headache Red Flags That Warrant Imaging
Based on the American College of Radiology’s headache imaging guidance
❗ Sudden, severe headache that peaks within minutes (“thunderclap” onset) |
❗ Headache following a head injury or fall |
❗ New headache with fever, stiff neck, or neurological deficit |
❗ Vision changes, confusion, weakness, or slurred speech |
❗ Headache that is new or steadily worsening in pattern |
❗ New headache onset after age 50 |
❗ History of cancer or a weakened immune system |
❗ New or different headache during pregnancy or postpartum |
Any of these? Talk to your doctor about an MRI.
Source: American College of Radiology, ACR Appropriateness Criteria® — Headache
Headache red flags that warrant imaging (Source: American College of Radiology)
Real-World Proof: Why Timing and Imaging Choice Matter
Emergency rooms often start with a CT scan, and for good reason. CT is fast and effective at catching active bleeding in the first 24 to 48 hours after an injury.
But CT has limits. According to UMass Memorial Health, MRI becomes the preferred imaging tool after 48 hours because it’s more sensitive than CT at detecting small intracranial bleeds and bruising on brain tissue. MRI also uses magnetic fields instead of radiation, which matters for patients who may need follow-up scans.
CT vs. MRI: When Each Is Used After a Head Injury
Based on emergency-medicine imaging guidance
Source: UMass Memorial Health, “CT Scan vs. MRI — What’s Best for a Sports-Related Concussion?”
CT vs. MRI: when each is used after a head injury (Source: UMass Memorial Health)
This is the gap many patients fall into. Their CT scan came back clear at the ER. Weeks later, the headaches are still there. That’s often when a neurologist orders an MRI, because it can pick up subtle changes a CT scan was never designed to catch.
A clear CT scan doesn’t rule out every brain injury. It rules out what CT is built to see: active bleeding and major fractures. MRI fills the gap, showing smaller bleeds, bruising, and soft-tissue changes that guide a neurologist’s next steps. That distinction is central to how the American College of Radiology directs physicians to choose imaging for head injury and headache cases.
Step-by-Step: Getting an MRI for Head Injury or Headaches in Orlando
- Talk to your doctor. Describe your symptoms and injury. Ask if imaging makes sense for your case.
- Get your order and schedule your scan. Clearview Diagnostic accepts referrals, and self-pay patients can walk in without one.
- Complete your MRI. A head MRI takes about 30 to 45 minutes. Clearview’s high-field 1.5T MRI produces detailed brain images while its wide-bore design keeps the exam comfortable.
- Review your results. Clearview offers same-day reports in many cases, so your neurologist can start treatment planning faster.
💡 Tip: Tell the technologist about any metal implants, pacemakers, or claustrophobia concerns before your scan.
Get Clarity on Your Head Injury Symptoms
A headache after a head injury isn’t something to guess about. When symptoms are severe, worsening, or lingering past 48 hours, MRI gives your doctor the clearest picture of what’s happening inside your skull.
If you’re in the Orlando area and dealing with headaches after a head injury, Clearview Diagnostic offers high-field MRI with walk-in availability and same-day reports. Schedule your MRI today and get the answers you need.
CLEARVIEW DIAGNOSTIC
(407) 704-3333
(407) 601-1963
Mon, Wed, Fri: 8AM–8PM | Tue, Thu: 8AM–5PM
8076 S. Orange Blossom Trail, Orlando FL 32809
