Yes, send her to the hospital immediately.
A 57-year-old woman with new unilateral headache and persistent right facial numbness requires urgent hospital evaluation with neuroimaging to exclude serious secondary causes, particularly stroke, cerebral venous sinus thrombosis, or other life-threatening conditions.
Why This Requires Urgent Evaluation
This presentation contains multiple red flags that mandate immediate investigation 1:
- Focal neurological symptoms (persistent facial numbness) accompanying headache
- New or atypical headache pattern in a middle-aged woman
- Unilateral presentation with neurological deficit
These features distinguish this from typical primary headache disorders and raise concern for secondary causes that can be life-threatening if missed.
Critical Differential Diagnoses to Exclude
Stroke or TIA
Isolated facial numbness with headache can represent:
- Thalamic or brainstem infarction 2 - A case report describes a 47-year-old with isolated perioral and tongue numbness that revealed multifocal infarcts on MRI
- Migrainous infarction 3 - A woman in her 40s with "unusual migraine" had acute infarcts in occipital and parietal lobes confirmed on MRI
Cerebral Venous Sinus Thrombosis (CVST)
This is particularly concerning because:
- CVST can present with headache and focal deficits 4, 5
- D-dimer can be normal 4 - A 49-year-old woman with severe unilateral headache had CVST despite normal D-dimer
- Premenopausal/perimenopausal women are at higher risk, especially with oral contraceptive use 5
- Mortality is 3-15% if missed 5
Other Serious Causes
Required Immediate Workup
The hospital must perform:
MRI brain with MR venography (MRV) - This is the gold standard 4
Complete vascular imaging including intracranial and extracranial vessels
Risk factor assessment for thrombotic events
Common Pitfalls to Avoid
Do not be falsely reassured by:
- Normal CT scan 5 - A 26-year-old woman was discharged after normal CT but returned the next day; MRI revealed thalamic infarct from cerebral venous thrombosis
- Normal D-dimer 4 - This does not exclude CVST in high-suspicion cases
- Attribution to "anxiety" or "functional disorder" 5 - This delayed diagnosis in a postpartum woman with CVST
Do not diagnose primary headache disorder (migraine, tension-type headache) when red flags are present 1. Guidelines explicitly state that focal neurological symptoms are red flags requiring investigation for secondary causes.
Clinical Reasoning
While migraine can present with unilateral headache, persistent facial numbness is not a typical migraine feature and represents a focal neurological deficit. The 2021 Nature Reviews Neurology guideline emphasizes that "focal neurological symptoms" are red flags mandating further investigation 1.
Clinical judgment must take precedence over normal initial tests 4. The risk of missing a treatable, potentially fatal condition (stroke, CVST) far outweighs the inconvenience of hospital evaluation.
The evidence consistently shows that atypical presentations with neurological deficits require advanced neuroimaging regardless of initial test results, and delays in diagnosis lead to worse outcomes including permanent disability and death.