PRACTICAL HEALTH · SYMPTOMS
🤕 Headache
Headaches are common and can have many causes. The pattern, intensity and accompanying symptoms help determine when medical evaluation is needed.
What should you notice?
- Whether it started suddenly or gradually.
- Where the pain is located and how intense it is.
- Fever, stiff neck, nausea or vomiting.
- Vision changes, weakness, numbness, confusion or trouble speaking.
- Recent head injury.
Possible causes
These are examples, not a diagnosis. The same symptom can have many different causes.
- Tension-type headache.
- Migraine.
- Viral illnesses and fever.
- Dehydration or lack of sleep.
- Other medical conditions that require evaluation.
What can you do initially?
- Rest in a quiet environment if appropriate.
- Drink fluids if you are able and do not have a fluid restriction.
- Pay attention to new or unusual symptoms.
- Seek medical advice for a new, persistent or worsening headache.
🚨 Warning signs
- A sudden, extremely severe headache.
- Weakness, numbness, confusion, seizure or trouble speaking.
- Stiff neck with fever or rash.
- Headache after a significant head injury.
- New severe headache with major vision changes.
If you believe the situation is life-threatening, call 911 in the United States.
Medical sources
Medical review: September 2026.
Educational information: This page provides general health information. It does not establish a diagnosis, prescribe treatment or replace evaluation by a qualified healthcare professional.