What causes headaches?

04:25

What can be done about these conditions, which dramatically affect many people’s quality of life? Tension headaches and most secondary cases can be treated with over-the-counter pain medications, such as anti-inflammatory drugs that reduce cranial swelling. And many secondary headache triggers, like dehydration, eye strain, and stress, can be proactively avoided. Migraines and cluster headaches are more complicated, and we haven’t yet discovered reliable treatments that work for everyone. But thankfully, pharmacologists and neurologists are hard at work cracking these pressing mysteries that weigh so heavily on our minds.

From: What causes headaches?