Migraine or Tension Headache? How to Tell Them Apart

If your head is pounding, you might assume a headache is a headache. But a tension headache and a migraine are fundamentally different experiences. Telling them apart matters. Understanding which you have helps you manage your daily life better, and if needed, you'll have a clearer conversation with your doctor. Sam users often track patterns in their sleep, stress, and daily habits to better understand their headache triggers, which can be a useful reference point in those conversations.

What defines a migraine

The International Headache Society's ICHD-3 (International Classification of Headache Disorders, 3rd edition) gives neurologists a consistent definition of a migraine attack: it lasts 4 to 72 hours, typically affects one side of the head, and has a pulsating quality. The pain is moderate to severe and characteristically gets worse with routine physical activity: climbing stairs, walking, or even bending forward can intensify it. A migraine is usually accompanied by nausea or by sensitivity to light or sound (photophobia or phonophobia, or both). Not everyone experiences all these features in every attack, but the pattern of these combined characteristics is what distinguishes migraine from other headache types.

The pulsating, one-sided nature and activity sensitivity are key: if your headache feels like a tight band and doesn't get worse when you move around, it's likely not a migraine.

Tension headaches: the most common type

A tension headache, by contrast, typically feels like a tight band of pressure across the forehead, temples, or back of the head and neck. It is usually bilateral (affecting both sides equally), not pulsating, and generally mild to moderate in intensity. It does not get worse with physical activity; in fact, many people find that moving around or stretching actually helps. Tension headaches rarely come with nausea or light sensitivity. If you notice either of these, you are likely not dealing with simple tension. Duration is also much shorter: tension headaches typically last 30 minutes to several hours, though episodes can occasionally extend much longer, up to a day or more.

Triggers, patterns, and your personal map

Research from German guidelines (AWMF and the Deutsche Migraene- und Kopfschmerzgesellschaft, DMKG) confirms that migraine has a specific constellation of well-documented triggers beyond simple stress: irregular sleep (both too little sleep and sleeping much later than your usual time), the "let-down" period after stress ends (not during the stress itself), skipped meals or dehydration, hormonal fluctuations, and alcohol, particularly red wine for some people. Weather changes are frequently reported by patients, though the causal link remains scientifically debated.

Tension headaches are less specifically tied to these factors. They are more directly linked to muscle tension from posture, stress-related neck tightness, or both.

This is why keeping track of when your headaches occur, how long they last, and what you were doing beforehand matters. Neurologists routinely use patient-reported headache diaries (recording frequency, duration, suspected triggers, and associated symptoms like nausea or light sensitivity) as a standard diagnostic and treatment-planning tool. Sleep, resting heart rate, and migraine: what your Apple Health data can show explores how understanding your own sleep patterns and other baseline metrics can support this kind of personal awareness.

When to seek medical advice

If you experience frequent headaches, a sudden and significant change in your headache pattern, or headaches that are disabling or prevent you from work and daily life, a conversation with your doctor or neurologist is important. They can take a complete history, perform an examination, and help you understand what is happening and what options exist.

If you are already tracking your sleep, stress levels, or daily patterns (whether through Sam, a personal diary, or another method), bring that information to your appointment. Your doctor benefits from understanding not just the headache itself, but the context of your life: your sleep rhythm, stress periods, eating patterns, and any other factors you have noticed.

Where Sam Health fits in

Sam reads your sleep duration, sleep timing, resting heart rate, and stress level from Apple Health and shows you how these factors correlate with your own baseline over time. Many people notice patterns (more frequent or severe headaches after a night of poor sleep, or during periods of high stress), and that kind of personal trend data can be one helpful input into your conversations with your doctor.

Sam is a wellness companion, not a medical device. Sam does not diagnose, treat, or prevent any illness and does not replace medical advice. For health questions, always consult a qualified medical professional. Sam does not detect or predict migraine attacks directly.

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Sources

• International Headache Society. International Classification of Headache Disorders, 3rd edition (ICHD-3).
• Deutsche Gesellschaft für Neurologie (DGN) and Deutsche Migraene- und Kopfschmerzgesellschaft (DMKG). S1-Leitlinie Migraene (German guideline on migraine).
• Vgontzas, A., & Pavlovic, J. M. "Sleep Symptoms and Disorders in Episodic Migraine: Assessment and Management." Current Pain and Headache Reports, 2023.