The German school now speaks of an exudative diathesis, in children who have a tendency to certain kinds of skin eruption. Many children seem prone to skin troubles, while others, though frequently ill, do not have much skin trouble. Skin troubles are due to a few simple causes, but these causes produce skin troubles in one child and catarrh or bronchitis or gastritis in another.

Toxemia or autotoxemia of one form or another seems to be associated with practically all forms of skin disease. In Bright's disease, for instance, the poisons that are held in the body, frequently give rise to skin disease. Eczema, in particular, is frequently seen in diabetes. Stomach and bowel disorders in children frequently give rise to skin troubles. Indeed digestive troubles are frequently the sole cause of skin troubles in growing children. "Erythema" (redness or blushing), a slight inflammatory condition of the outer layers of the skin, seems to be definitely due to deranged digestion. This condition may sometimes be accompanied by a slight exudation. It may and may not itch. There may be kidney "derangement" and fever. All gastro intestinal diseases and general nutritive disturbances--gastric and intestinal dyspepsia, gastric irritation, gastro-intestinal, catarrh, etc.--giving rise to gastro-intestinal auto-intoxicaton, may result in skin diseases. These disorders are present in almost every case of eruptive skin disease.

Food, if fresh and pure, is not poison. But the best of food, when it undergoes putrefaction and fermentation in the stomach and intestine, becomes poisonous. Sugars, candies, syrups, etc., by oversaturating the blood with sugar, and also by deranging digestion and producing a general abnormal chemical action in the body, are frequent causes of skin eruptions. Wrong food combinations--starch and sugar, cereal and sugar, hot cakes and syrup--fats, gravies and all "rich" foods may give rise to skin troubles.

Certain foods, such as strawberries and peaches, cause a skin rash in some people, when eaten. Oysters and shell-fish do the same with many people. Such people are said to possess an idosyncrasy or hypersensitiveness to such foods. Some article of food is often blamed for trouble when it is the combination that is at fault. Cow's milk, particularly if sugar is added, is a common cause of eruptions in children. Any disease associated with digestive disorders and nutritive impairments, such as Brights disease, diabetes, rheumatism, uric-acid diathesis, ulcerative processes, child-bed fever, scrofula and menstrual disturbances, may be accompanied by skin disorders.

Serums and vaccines are frequent causes of skin eruptions. Serum rashes may be of different forms and degrees and may be apparently cured only to recur immediately in the same or another form. There are few skin diseases that cannot be produced by drugs alone. Morphine, turpentine, quinine, copabia, chloral, iodine, salicylic acid, arsenic, the bromide, coal-tar products (most of which are used to reduce fever and "kill" pain), mercury, belladonna, formalin, digitalis, arsphenamine, veronal, tea, coffee, alcohol, insulin, etc., used internally, are frequent causes of skin liseases. Belladonna produces eruptions resembling scarlet fever; mercury may produce eruptions simulating measles, while its eruptions are frequently called syphilis. Many drugs produce urticarial eruptions (hives), papules (small bumps), pustules and even hemorrhagic (blood-filled) eruptions. Others produce scaling or desquamation of the skin.

Such irritants as strong soaps, mustards acids, cantharis, or Spanish fly, croton oil, aniline dyes, iodoform, some salves, carbolic acid and other antiseptic and counterirritant preparations and washes cause skin trouble.

Mercury may be used as a medicine or may be absorbed from working in quick-silver mines, and mirror and thermometer factories. Arsenic may be absorbed from wall paper. Quinine is used in many hair tonics. Bromids form an important ingredient of Bromo-seltzer, so freely used in this land of "beverage" guzzlers. Paraphenylenediamine, used to color furs black, and quinone, used to make brown furs, produce skin troubles in fur workers and fur wearers. The artificial leather used in making hat bands and for other purposes may cause skin troubles. Phosphorus matches have been causes of skin trouble. Many face powders, cream, lotions bleachers, whiteners, etc., cause skin eruptions.

Poison ivy or poison oak, dogwood, sumac, poison primrose and certain nettles and other poisonous and irritating plants cause skin disorders.

Putrescent matter from decaying meats and vegetables, coming in contact with the skin may cause a local infection and give rise to skin eruptions of various forms.

Uncleanliness, the use of soiled diapers which have been dried without washing, allowing a baby to go for long periods without drying or cleaning it, etc., may all give rise to irritation of the skin, with redness, rawness, soreness, pain, etc.

X-ray burns, radium burns, burns from so-called therapeutic lamps, sun burns, cuts, bruises, tearing, scalds, burns, friction from tight bands, garters, etc., and like thermal and mechanical injuries cause local trouble.