In connection with many troubles, what may be called local assimilation has to be considered. A foot, say, with a bad abscess or diseased bone (see Pain, Severe) is cured by hot bathing and pressure. From a shrunken and feeble limb, the leg grows to a healthy and strong one. This occurs because the heat and pressure have so stimulated its vitality that the material supplied by the blood can be utilised in the leg for purposes of healthy growth. So with any other part of the body. Such diet as we have indicated supplies easily assimilated substance. The local heating, pressure, and bathing enable this substance to be utilised where it is needed. A little careful thought on this line will guide to proper treatment of almost any case where assimilation has failed, either locally or generally, and will lead the way to a method of cure.

Asthma exists in various forms, having equally various causes. One of these causes, giving rise to a comparatively simple form of the disease, is cramp of the ring-muscle of the windpipe, so contracting the windpipe that breathing is rendered difficult. A "wheeze" is heard in breathing, though there is no bronchitis or lung trouble present. The cause of this cramp is an irritation of the ring-muscle's nerve. It can be relieved by pressing cold cloths gently along the spine, from the back of the head to between the shoulders, taking care that the patient remains generally warm during the treatment, and attending to the feet and skin as directed below in this article. Sometimes the cause seems to lie in the air of the place where the sufferer resides. A change either to high ground or the seaside will often entirely remove asthma, especially in the young. In any such case a trial should be made of several places, if that be at all possible, and that place fixed upon where the asthma is least felt. At seamill sanatorium (see) many asthmatic persons have found complete freedom from their trouble from the day of their arrival, and the treatment given has made this cure permanent.

Another cause of asthma is lack of power in the breathing muscles. In such a case the patient clings to a particular attitude, in which alone he can breathe. This is in most cases due to a lack of vitality in the root nerve which supply the breathing muscles.

An attack of this may often be relieved by rubbing, with the points of the fingers chiefly, gently yet firmly up and down each side of the spine, close to the bone. Even rubbing above the clothing will frequently relieve. The roots of the nerves supplying power to the breathing muscles lie just on each side of the spine, and this kind of rubbing stimulates these roots. It is not rubbing of the skin or backbone which is wanted, but such gentle treatment of the nerve roots on either side of the bone as makes them glow with genial warmth. This rubbing is of course better done on the surface of the skin. See that the patient is warm, then dip the fingers in cold water, and rub as directed. When the water makes the patient feel chilly or he tires of it, use fresh olive oil, warmed if necessary. Avoid all alcoholic drinks, which simply rob the nerves of the very power needed for cure. Temporary relief may be given by such drinks, but it is at the expense of lowered life and reduced chances of recovery.

A tablespoonful of hot water every five minutes is the best curative drink. It may be given for several hours if required. To give this rubbing treatment and drinking hot water fair play, however, attention must be paid most carefully to the feet and skin of the patient. The feet frequently are cold, and in bad cases swell, the skin at and above the swelling being pale and soft. In minor cases this state of the feet may be treated by rubbing with hot olive oil. In serious cases rubbing is to be alternated with bathing the feet in hot water, until the feet and limbs glow with heat. This may be done two or three times a day, for half an hour, or even an hour. It increases very greatly the vital power for breathing.

Again, the skin in bad cases of asthma becomes dry, hard, and a light brown substance forms on its surface. If the skin thus fails, severe work is thrown on the already overloaded lungs, and the breathing is much worse. Give the patient a night's pack in the soapy blanket (see). If there is not strength to stand the entire treatment, keep in the blanket pack for a shorter time—one, two, or three hours. Not more than two nights of this treatment should be needed at a time. The soapy blanket greatly stimulates the skin, and opens all the closed pores, immensely relieving the lungs. If feet, skin, and back be treated as we have advised, even a very obstinate case of asthma should be cured. See Appendix; Bathing the Feet; Rubbing; Soap; Soapy Blanket.

Back Failures.—Often a severe pain in the toe, foot, ankle, or lower leg has its cause, not in anything wrong with the part which is painful, but in some failure of nerve in the patient's back. Blistering or other treatment of the painful part will often injure, and cannot do much, in any case, to cure. Pains even in the knee and groin sometimes have the same cause—in back failure. In other cases the symptoms are, weariness, stiffness, inability to stoop, or stand long without support, and pains in the stomach and thighs.

A little thought will enable any one to distinguish between pains due to back failure and those due to local causes. If there is no appearance of anything wrong at the part pained, then the evil is probably in the back. It is even a good rule to consider the pain at first as due to back failure rather than local causes, for by treatment of the back the local trouble, when that is present, is much helped and relieved.

In the case of pains in the arms or hands, the upper part of the back is indicated; in leg and foot troubles, the lower part. Neuralgic pains are almost always of this class.

In any case of this kind, heat may be applied to the spine, and rubbing with hot oil given to it, at its upper or lower part as required. If the heat and rubbing increase the pain, then cold applications may be used. Sometimes heat and cold may be needed alternately; but common sense must guide, and all irritation or chilling of the patient must be carefully avoided.