Prurigo is a disease of the skin, manifesting itself by slightly reddish, very itchy papules of about the size of a pin head. This eruption may appear differing little or none in color from the surrounding skin, and be seen with difficulty; but to the touch it is obvious, as the finger passes over the region affected, the papules as minute elevations cause the surface to feel rough and uneven. The intense itching induces scratching; the papules are laid bare, and are succeeded by blood-red crusts of about the same size. The cause of prurigo can only be conjectured. Various speculations have been advanced; thus, certain kinds of food, worms, kidney disorders, debility, poverty of blood are said to exert predisposing influences.

The disease is chronic, and at times exceedingly obstinate. Its duration and curability are uncertain. In young animals the affection often yields Very readily, but in old dogs with worn out systems, it is almost incurable.

In the treatment it is important to correct any disorders, and apply constitutional remedies as indicated. Local applications are of benefit in many cases.

When the disease attacks puppies, frequent washing, using the sapo viridis, and afterwards an ointment of sulphur and lard, is often sufficient. If the itching is uncontrollable the following may be freely applied. -

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In some oases the oil of tar and glycerin, one part to four, will be useful, or the tar and sulphur ointment recommended in eczems. A lotion of carbolic acid, from one to two drachms to a pint of water, or the acid incorporated with lard, from five to ten grains to the ounce, acts well in cases where the itching is intense. The internal use of iron, arsenic, and cod liver oil is advisable in cases where the disease is of long standing.