3 ms·

Because there are no pain receptors in the brain, so if you have headache, you are just hallucinating your own pain through some positive feedback mechanism.

• dragonwriter 1y ago
  Er, no. There are no pain receptors in the brain, but there are pain receptors in the head (particularly, the meninges, periosteum, and scalp), and those are the receptors which produce headaches.
  • general1726 1y ago
    I don't think that you had headache before, because that you would know that would hurts is not a scalp.
    • dragonwriter 1y ago
      I’ve had many headaches, some of which respond exactly like you’d expect if the source of pain was receptors in the scalp, others of which do not. The meninges and periosteum, which I mentioned also have pain receptors which can be involved in headaches, are very much not the same thing as the scalp. The idea that the brain doesn't have pain receptors implies that headaches are just hallucinated pain is just completely nonsense.
      • 1718627440 1y ago
        In my understanding of the term pain in the scalp is not a headache, that would be pain in the scalp.
  • metalman 1y ago
    BLARG! there is a very very good chance that there are other mechanisms for triggering pain responses, like unnatural chemicals, such as concentrated ethenol or diesel fuel, photo copier fluid, etc, that can cross the blood brain barier, causing intense pain in many cases, but have little effect if applied topicaly. on the flip side, one rather interesting thing about pain, is that it impossible to trigger pain from a memory, but then there are cases of symptoms of phantom pain in lost limbs, so I feel strongly that there will be new knowledge soon about pain, especialy as there a number of promising non opiod pain relievers that use completly different pathways to block pain.