The brain itself has no pain receptors. But the blood vessels supplying the brain, and the membranes that surround it (the meninges) do feel pain. It is these that produce a ‘headache’.
Most people experience headaches from time to time, and they are usually nothing to worry about. The possible causes are too numerous to list, but tension, anxiety, overwork, irregular meals, eyestrain and alcohol are the most common ones. Regular headaches are a sign that something is amiss, and simply suppressing this warning sign with a painkiller, and ignoring the underlying cause, is a mistake. Mild or moderate headache that is continuous is generally regarded as psychosomatic. A sudden attack of severe recurrent headaches, or daily headaches, may be a sign of some serious underlying illness, such as meningitis or brain tumour – medical help should be sought without any delay.
Recurrent headaches are often reported as a feature of food intolerance, and in some people they may be the sole symptom, although there will usually be some other problems as well. Hyperventilation and Candida overgrowth may also cause headache, among other symptoms.
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