Scalp Hematoma After Head Injury
A raised scalp hematoma can occur after minor head trauma and does not by itself confirm a dangerous brain injury. Immediate medical attention is recommended when a head injury is accompanied by specific high-risk features or clinical deterioration. [1][2]
High-Risk Features Requiring Emergency Evaluation
Emergency transport to an emergency department is recommended when any of the following are present after a head injury. [1]
- Unconsciousness or inability to keep eyes open. [1]
- Any focal neurologic deficit after the injury. [1]
- Any suspicion of a complex skull fracture or penetrating head injury. [1]
- Any seizure after the injury. [1]
- High-energy head injury mechanism. [1]
- Loss of consciousness because of the injury (even if recovered). [1]
- Amnesia for events before or after the injury. [1]
- Persistent headache since the injury. [1]
- Any vomiting episodes since the injury. [1]
- Current anticoagulant or antiplatelet treatment (except aspirin monotherapy). [1]
- History of bleeding or clotting disorder. [1]
- Continuing concern about the diagnosis by a clinician or caregiver. [1]
Clinical Deterioration After a Seemingly Minor Bump
A medical emergency is indicated when symptoms that suggest bleeding inside the skull develop or worsen after the injury. [2]
- Becoming unconscious after initially appearing fine. [2]
- Any progression of neurologic symptoms after an initial normal period. [2]
Scenarios Where “Immediate” Assessment Is Still Needed
A same-day urgent evaluation is appropriate when there is ongoing concern about the head injury despite the absence of the specific emergency features listed above. [1][3]
- Continuing concern by the injured person or family about the diagnosis. [1]
- Visible head trauma that remains concerning to the evaluating professional. [1]
- No reliable supervision available to observe the person at home. [1]
Targets for Observation and Return Precautions
Hospital discharge planning for head injury includes explicit instructions about signs that require return to the emergency department and specifies that a responsible adult should stay with the person for the first 24 hours. [1]
- Return precautions should be included in written instructions. [1]
- A responsible adult should remain with the injured person for the first 24 hours. [1]
Safety Guidance for First Aid Pending Care
Serious head injury with bleeding or brain damage should be treated in a hospital setting. [3]
- If serious head or neck injury is suspected, emergency evaluation is recommended. [3]
- When emergency care is required, the person should not be moved until emergency medical help has arrived and evaluated. [3]
Practical Decision Rule
Emergency medical attention is required for a raised frontal scalp hematoma only when it occurs in the context of head injury with any high-risk feature (loss of consciousness, vomiting, seizure, focal deficits, skull fracture concern, anticoagulant use, persistent headache, high-energy mechanism) or when clinical deterioration occurs after initial improvement. [1][2]
Common Pitfall
Equating a scalp hematoma with intracranial bleeding leads to under-triage when red flags are present or to missed risk when risk factors such as anticoagulant or antiplatelet use are present despite an apparently localized bump. [1][2]