Tension headaches are by far the most common type - a dull, band-like ache often triggered by stress, poor posture, dehydration, tiredness or a missed meal. Rest, water, over-the-counter painkillers and dealing with whatever's triggering it usually bring enough relief.
Reaching for painkillers too often can itself trigger what's known as a "medication overuse" headache, so it's worth not leaning on them constantly. Seek urgent help from a GP or 999 for a headache that comes on suddenly and severely, is paired with a stiff neck, confusion, weakness, vision changes or a rash, or follows a knock to the head - these can point to something more serious.
See also our page on migraines, a distinct and often more intense form of headache.
Common questions
What type of headache is most common?
A tension headache - a dull, band-like ache frequently linked to stress, poor posture, dehydration, tiredness or missed meals.
When does a headache count as a medical emergency?
If it starts suddenly and severely, or comes with a stiff neck, confusion, weakness, changes in vision or a rash - get help urgently.