You should consider medical evaluation if your headaches are:
- Becoming more frequent
- More severe than usual
- Affecting work, sleep or daily activities
- Not improving with appropriate treatment
- Changing in their usual pattern
A sudden, extremely severe headache or a headache accompanied by symptoms such as weakness, numbness, difficulty speaking, confusion, seizures, vision problems, fever or a stiff neck requires urgent medical assessment. Headaches following a significant head injury also require prompt evaluation.