Arm Numbness, Nausea & Brief Unconsciousness: Emergency Red Flags

⚠️ SEEK EMERGENCY CARE IMMEDIATELY (Call 911 / Go to ER). This symptom triad suggests potentially life-threatening conditions:

Critical Differential Diagnoses

Condition	Key Features	Urgency
Stroke / TIA	Unilateral arm numbness/weakness, ± face droop, speech difficulty, sudden onset	⚡ Minutes matter (tPA window)
Acute Coronary Syndrome	Chest pressure, radiation to arm/jaw, nausea, diaphoresis, syncope	⚡ Immediate ECG, troponin
Cardiac Arrhythmia	Palpitations → syncope (VT, SVT, heart block), nausea from low output	⚡ EMS monitoring
Subarachnoid Hemorrhage	Thunderclap headache, nausea, brief LOC, ± focal signs	⚡ CT head, LP
Vertebrobasilar Insufficiency	Posterior circulation TIA: bilateral arm symptoms, vertigo, diplopia, LOC	⚡ Urgent vascular imaging
Seizure	Post-ictal confusion, tongue biting, incontinence, witnessed tonic-clonic	⚡ Neuro eval, EEG
Vasovagal Syncope	Prodrome (nausea, warmth, tunnel vision) → brief LOC → rapid recovery	⚡ Rule out cardiac/neuro first

Immediate Actions While Seeking Care

• Do not drive. Call 911.
• Lie flat, elevate legs if faint.
• Loosen tight clothing.
• If diabetic: check glucose – treat hypoglycemia if <70.
• Note exact symptom timeline for providers.

What NOT to Do

• Wait to "see if it passes."
• Self-medicate.
• Assume it's "just anxiety" without evaluation.

Time is brain/heart muscle. Even if symptoms resolve, the underlying cause may be progressive. Emergency evaluation is mandatory.