What Causes Headache? Common & Serious Causes Explained
Headache can be caused by Stroke, Meningitis, Bacterial Meningitis and other conditions. Learn which causes are serious, which are benign, and when to seek urgent medical evaluation.
Updated March 27, 2026
Headache has multiple causes, ranging from benign to serious. The most common include Stroke, Meningitis, Bacterial Meningitis. A stroke occurs when blood supply to part of the brain is cut off (ischemic) or a blood vessel ruptures (hemorrhagic), causing brain cells to die. Fast action is critical — every minute matters. Use the FAST acronym: Face drooping, Arm weakness, Speech difficulty, Time to call emergency.
Clinical Context
The causes of headache range from benign to serious. Identifying the underlying cause requires clinical evaluation. Common causes include Stroke, Meningitis, Bacterial Meningitis, Subarachnoid Hemorrhage, and others.
Clinical Pathway
Headache — Symptom HubSymptomStroke — Full Condition GuidePrimary CauseStroke — Differential DiagnosisDifferentialStroke vs. Transient Ischemic Attack (TIA) — Comparisonvs.Meningitis — Full Condition GuideUrgent CauseBacterial Meningitis — Full Condition GuideUrgent CauseSubarachnoid Hemorrhage — Full Condition GuideUrgent CauseFrequently Asked Questions
Why do I have headache? common & serious causes explained?+
Headache has multiple causes, ranging from benign to serious. The most common include Stroke, Meningitis, Bacterial Meningitis. A stroke occurs when blood supply to part of the brain is cut off (ischemic) or a blood vessel ruptures (hemorrhagic), causing brain cells to die. Fast action is critical — every minute matters. Use the FAST acronym: Face drooping, Arm weakness, Speech difficulty, Time to call emergency.
What is the most common cause of headache?+
Common causes include Stroke, Meningitis, Bacterial Meningitis. The most likely cause depends on age, associated symptoms, and medical history.
When is headache dangerous?+
Seek medical attention if headache is persistent, worsening, sudden in onset, or accompanied by other concerning symptoms.
Can headache be caused by stress or anxiety?+
Yes — psychological stress can contribute to many physical symptoms, but organic causes should be excluded by a healthcare provider.
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