Headache: Causes, Types & When to Worry
头痛原因与就医指征
Most headaches are harmless and are triggered by common things like stress, poor sleep, dehydration, or eye strain. Knowing your headache type and pattern helps you manage it safely at home. Get urgent care right away for a sudden severe headache, or one with fever, confusion, weakness, or vision changes.
What Is a Headache?
A headache is pain or discomfort in the head, scalp, or neck. Most headaches are not dangerous, but they can disrupt your day, your sleep, and your mood. Learning your typical pattern helps you and your doctor choose the right care.
Common Types of Headaches
Doctors group headaches by their pattern and features. The most common types are listed below. Each type responds to different treatments, so knowing the difference matters.
- Tension-type headache: a dull, pressing pain on both sides, often like a tight band around the head. Stress and muscle tension are common triggers.
- Migraine: throbbing pain, often on one side, with nausea or sensitivity to light and sound. Some people notice warning symptoms, called an aura, before the pain starts.
- Cluster headache: severe pain around one eye that comes in repeated attacks over weeks. It is less common but very intense.
- Medication-overuse headache: headaches caused by taking pain relievers too often, which makes the pain return as each dose wears off.
Common Causes and Triggers
Many everyday factors can set off a headache. These include stress, poor sleep, dehydration, skipped meals, too much caffeine or caffeine withdrawal, alcohol, and long screen time. Poor posture, eye strain, strong smells, and weather changes can also play a role. Headaches may also come with illnesses such as colds, flu, or sinus infections.
Self-Care That May Help
- Drink water and eat regular meals.
- Rest in a quiet, dimly lit room if light or sound bothers you.
- Place a cool or warm cloth on your head or neck, whichever feels better.
- Try gentle neck stretches and take short breaks from screens.
- If you use over-the-counter pain relievers, follow the label carefully and do not take them more often than directed.
Keep a Simple Headache Diary
Write down when headaches happen, how long they last, how severe they are, and what you were doing beforehand. Note your sleep, meals, stress levels, and menstrual cycle if relevant. A diary often reveals patterns you would otherwise miss. Bring it to your appointment, because it helps your doctor identify the type and plan treatment.
Self-check steps
1Describe the pain
Note where it hurts, what it feels like (pressing, throbbing, stabbing), and rate the severity from 1 to 10. These details help identify which type of headache you have.
2Look for warning signs
Check for a sudden severe headache, fever with a stiff neck, weakness, confusion, or vision changes. Any of these means you need urgent medical care.
3Review your last day or two
Think about your sleep, stress, meals, fluids, caffeine, alcohol, and screen time. Many headaches have a trigger you can spot and then avoid.
4Check your painkiller use
Count how many days per week you take pain relievers. Frequent use can cause rebound headaches, so if you rely on them most days, talk to a doctor.
5Track the pattern over time
Record how often headaches occur and whether they are changing or getting worse. A new or steadily worsening pattern deserves a medical review.
When to seek medical help
Call your local emergency number, or have someone take you to emergency care, if a headache comes on suddenly and severely, feels like the worst headache of your life, or follows a head injury. Seek emergency care as well if a headache comes with fever and a stiff neck, weakness or numbness, trouble speaking, vision changes, confusion, a seizure, or a rash that does not fade when pressed. Make a non-urgent doctor's appointment if your headaches occur more than a few times a month, wake you from sleep, keep getting worse, start for the first time after age 50, or do not improve with usual self-care. If you are pregnant and develop a new or severe headache, contact a health professional promptly.
Frequently asked questions
When is a headache an emergency?
How is a migraine different from a tension headache?
Can pain relievers make headaches worse?
How many headaches are too many?
This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.
This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.
If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.
Medically reviewed by WellAlly Editorial Team Last reviewed August 5, 2026. · Read our editorial policy