Symptoms

Thunderclap headaches are dramatic. Symptoms include pain that:

• Strikes suddenly and severely
• Peaks within 60 seconds
• Can be accompanied by nausea or vomiting

Thunderclap headaches might be accompanied by other signs and symptoms, such as:

• Altered mental state
• Fever
• Seizures

These signs and symptoms might reflect the underlying cause.

When to see a doctor

Seek immediate medical attention for any headache that comes on suddenly and severely.