This condition often occurs when horses are supplied with bad forage, as mow-burnt or mouldy hay, or kiln-dried oats. It may also be due to giving too much diuretic medicine, as nitrate of potass, turpentine, etc. What are called "condition powders" produce it sometimes, and cantharides blisters have been known to act in this way, from the cantharidine becoming absorbed and acting on the kidneys.

The treatment will depend upon the cause. Clay mixed in the water given to drink is often of great service. The administration of a little laxative medicine, as linseed-oil, or small doses of calomel, is all that is necessary in some cases. A drachm or two of iodide of potassium mixed in linseed-tea is another remedy, with tonics, such as sulphate of iron, if there is debility. A drachm of iodine given in bolus has been vaunted as a specific.