Painful truth about headaches and how they're 'essential' for your body

mirror.co.uk:

The idea of pain being a good thing may seem unlikely, but headaches are ­important – they tell you something is wrong with your body.

The pain occurs when there is a ­breakdown between what your brain needs and what your vascular system, which carries your blood around, can bring it.

If your visual system needs to work harder because you forgot to wear your glasses, more and more blood will be diverted there to help you cope.

If perhaps you didn’t eat so well during the day, the blood won’t have as much glucose in it as it should, so even more blood is diverted to the visual system to provide the energy it requires. Sign up for a daily email to help you get through family life in lockdown at mirror.co.uk/lemonaid All the blood vessels