The migraine headache is considered a vascular headache, although the precise mechanism and etiology remain unknown. There are several known triggers some of which include food allergies, blood sugar disturbances, stress load, mechanical injury, and hormonal fluctuations. The vascular hypothesis of migraine, first proposed by Wolff, theorizes that the aura of migraine is caused by intracerebral constriction followed by extracranial vasodilation resulting in headache pain.
Migraines frequently occur in the early morning hours. Approximately 60 percent of people who have migraines experience symptoms, which may occur for hours or days before the onset of headache. Early symptoms may vary widely among those suffering from migraine, yet are usually consistent in an individual. They can present as psychologic symptoms such as irritability, anxiety, depression, fatigue, drowsiness or euphoria; or neurologic symptoms such as increased sensitivity to light, sounds, and smells. Symptoms such as diarrhea, constipation, excessive urination, stiff neck, thirst, yawning, or food cravings may also occur.
A study published in the journal Cephalagia investigated whether dietary restrictions based on IgG antibodies against certain foods influenced migraine headache frequency. The trial included 30 patients diagnosed with migraine without aura. The IgG antibodies were detected using the ELISA test. The patients were then randomized to a six week diet that either included foods with raised IgG antibodies or a diet that restricted those foods. Then after a two week diet-free interval, the patients were given the opposite diet. The results revealed that there was a reduction in the number of headaches and migraines during the elimination diet period. This information seems to indicate that diet restriction based on IgG antibodies may be an effective way of preventing and reducing the number of headaches and migraine attacks in people diagnosed with migraines.1
1 Alpay K, Ertas M, Orhan EK, et al. Diet restriction in migraine, based on IgG against foods: A clinical double-blind, randomised, cross-over trial. Cephalalgia. Jun2010.