The C-reactive protein is a protein the liver manufactures that often becomes elevated in the presence of inflammation. Doctors frequently order tests that measure the level of C-reactive proteins in the blood. If it's high, inflammation somewhere in the body is suspected to be the culprit.
Conditions that potentially result in elevated C-reactive protein levels are arthritis, lupus and other autoimmune diseases. Sometimes patients with these conditions don't have an elevated level, however. Elevated results are also associated with the risk of cardiovascular diseases such as heart attack and stroke. The doctor ordering the test can evaluate the results with regard to the particular patient and treat that individual accordingly.