The liver produces C-reactive protein, also known as CRP. The production of this protein rises abnormally when there is an infection or inflammation in the liver. When an infection hits the liver, the body reacts to it by producing a response team which is the C-reactive protein. The CRP test is done to detect any such infections and issues. This test is conducted on a sample of blood to find the extent of infections or tissue damages. The test is also used to examine the conditions of improvement in already diagnosed patients. It helps in measuring the extent of CRP.