What is a Headache? A headache happens when pain-sensitive nerve fibers (called nociceptors) are triggered in the network of nerves that extends over the scalp, face, and along the surface and the base of the brain. What are the Causes? Headaches have many causes including foods, environmental stimuli (noises, lights, stress, etc.) and/or behaviors (insomnia, excessive exercise, blood sugar changes, etc.), although 90% of all headaches … [Read more...]