Obviously, after what has been said of the world-wide causation of headache, to attempt to discuss its treatment would be as absurd as to undertake to advise what should be done for the relief of hunger, for "that tired feeling," or for a pain in the knee. The treatment for a headache due to an inflammation or tumor of the brain would, of course, be wide as the poles from that which would relieve an ordinary fatigue or indigestion pain. Besides, it is utterly irrational and often harmful to attempt _to treat any headache as such_. That is the open road to the morphine habit and drug addictions of all sorts. Remedies--and there are plenty of them--which simply relieve the pain without doing anything to remove its cause, merely make the latter state of that individual worse than the first. Headache is always and everywhere nature's vivid warning that something is going wrong, like the shrieking of a wagon-axle or the clatter of a broken cog in machinery. There is, however, fortunately one remedy which alone will cure ninety-nine per cent of all headaches, and that is rest. The first thing an intelligent machinist does when squeaking or rattling begins is to stop the machinery. This has the double advantage of preventing the damage from going any further and of enabling him to get at the cause. Headache, like pain anywhere, is nature's imperative order _to Halt_, at least long enough to find out what you are doing to yourself that you shouldn't. It makes little difference what you take for your headache, so long as you follow it up by lying down for an hour or two, or, better still, by going to bed for the remainder of the day and sleeping through until the next morning. If more headaches were treated in this way there would not only be fewer headaches, but two-thirds of the risks of nervous breakdown, collapse, insomnia, and chronic degenerative changes in the liver, kidneys, and blood-vessels would be avoided. This, of course, is a counsel of perfection, and incapable of general application for the sternest of reasons; but it does indicate the rational attitude toward headache and its treatment, and one which is coming to be more and more adopted. No motorist would dream of pushing ahead with a shrieking axle or a scorching hot box, unless his journey were one of most momentous importance or a matter of life and death. Pain is nature's automatic speed regulator. It is often necessary to disregard it, to get the work of the world done and to discharge our sacred obligations to others; but this disregarding should not be exalted to too high a pinnacle of virtue, and least of all worshiped as inherently and everywhere a mark of piety and one of the insignia of saintship.