If the emotion which ties the muscle-knot is very intense, and the stomach refuses to let go under ordinary measures, the pain may be severe. But a quantity of hot water or a dose of ipecac is sure to relieve the situation. If the person is able to give himself a good moral slap and relax his unruly muscles, he reaches the same end by a much pleasanter road. Some people are fond of the popular remedy of hot water and soda. Their faith in its efficacy is likely to be increased by the good display of gas which is sure to follow. As any cook knows, soda and acid always fizz. The soda is broken up by the hydrochloric acid of the stomach and forms salt and carbon dioxid, a gas. However, as the avowed aim of the remedy is the relief of gas rather than its manufacture, and as the soda uses up the hydrochloric acid needed in digestion, the practice cannot be recommended as reasonable. =Gastritis.= I once knew a woman who went to a big city to consult a fashionable doctor. When she returned she told with great satisfaction that the doctor had pronounced her case gastritis. "It must be true," she added, "because I have so much gas on my stomach!" The diagnosis of gastritis used to be very common. The ending _itis_ means inflammation,--gastritis, enteritis, colitis, each meaning inflammation of the corresponding organ. An inflammation implies an irritant. There can be no kind of _itis_ without the presence of something which irritates the membrane of the affected part. If we get unusual and irritating bacteria in some spoiled food, we are likely to have an acute inflammation until the offending bacteria are expelled. But an inflammation of this kind never lasts. People who have had ptomaine poisoning sometimes assert that they are afterwards susceptible to poisoning by the kind of food which first made them ill. Such a susceptibility is not so much a hold-over effect from the poison as a hold-over fear which tends to repeat the physical reaction whenever that food is eaten. I, myself, have had ptomaine poisoning from canned salmon, but I have never since had any trouble about eating salmon. =Sour Stomach.= Sometimes when a person lies down an hour or so after a meal, some of the contents of his stomach comes up in his throat. Then if he be ignorant of physiology, he may be very much alarmed because his stomach is "sour." Not knowing that he would have far greater cause for alarm if his stomach were _not_ sour, he may, if the idea is interesting to him, begin to restrict his diet, to take digestive tablets, and to develop a regular case of nervous dyspepsia. Sometimes when the specialists measure the amount of hydrochloric acid in the stomach, they do find too much or too little acid; but this merely means that an emotion has made the glands work overtime or has stopped their action for a little while. The functions of the body are so very, very old that there is little likelihood of permanent disturbance.