• Abnormal neurological examination (others than typical aura) |
• New headache in older patients |
• Headache increasing in frequency and severity |
• Worst headache ever |
• Sudden onset of headache |
• New-onset headache in a patient with risk factors for HIV infection or cancer |
• Headache with signs of systemic illness (e.g. fever, stiff neck, rash) |
• Papilloedema |
• Headache subsequent to head trauma |
• History of dizziness or lack of coordination |
• Progressively worsening headache |
• Headache worsening with Valsalva manoeuvre |