Kidney disease, otherwise known as acute Bright’s Disease or acute nephritis, is defined as an acute inflammation of the kidneys, and it is more or less diffuse in nature. Kidney disease may be either of a mild, severe or grave character. The acute type of nephritis arises as a result of some type of injury to the renal portion of the kidney, which is_ usually caused by bacterial infection or chemical toxins. To the first of these belongs the condition of acute nephritis, which is due to the toxins or poisons from the effects of scarlet fever and other infections. The classical example of the infectious type of acute nephritis is that which follows acute tonsilitis.