These can be triggered by any one or more of a range of stimulating factors. Triggers affect the brain, setting off events that result in dilation and inflammation of blood vessels. The changes in blood vessels may be caused by alterations in serotonin, a naturally occurring chemical in the body. As blood is pumped through the dilated and inflamed blood vessels, the sufferer feels the throbbing pain that is characteristic of migraine. Today, healthcare professionals have a clearer picture of what changes occur while a migraine attack is in progress, though it is less clear why this sequence begins.
Triggers can include things that are seen, smelled, heard, eaten, or experienced.
Migraine triggers are different for different people. Trigger identification and avoidance is one of the most helpful management techniques for controlling migraine frequency. Although an estimated 45 million Americans suffer from chronic headaches, not all of those headaches are classified as migraines. These headaches, accompanied by a dull pounding feeling, are usually produced by either fever or exposure to certain chemicals or substances. A common cause of toxic headaches is nitrites, contained in foods such as processed meats.