What is a blood CRP test?
Aug 20, 2025
Source: Cainiu Health
Dr. Liu Feng
Introduction
Under normal circumstances, blood CRP testing, also known as C-reactive protein testing, is a common laboratory test used in clinical practice to assess the degree of inflammatory response and infection. When undergoing a C-reactive protein blood test, it is important to avoid excessive alcohol consumption and strenuous exercise the day before the test to prevent interference with the accuracy of the results. It is also important to remain relaxed during the blood collection process.
Generally, blood CRP testing, also known as C-reactive protein testing, is a common laboratory test used in clinical practice to assess the presence and extent of inflammation and infection. Detailed analysis is as follows:
Detection of C-reactive protein (CRP) in the blood is one of the commonly used inflammatory markers in clinical settings. This test measures the concentration of CRP in the blood to reflect the degree of systemic inflammation. CRP is a protein synthesized by the liver in response to infection, trauma, or inflammatory stimuli. Normally, CRP levels in the blood are very low, but they rise rapidly within a short time when the body encounters abnormalities. This test is widely used in clinical practice, as it not only helps determine the type of infection but also assesses the severity of inflammation and monitors the effectiveness of disease treatment.
When undergoing a blood CRP test, it is important to avoid heavy alcohol consumption and strenuous exercise the day before the test, as these may affect the accuracy of the results. During blood collection, it is important to stay relaxed to prevent vasoconstriction caused by anxiety, which can make blood draw more difficult. After the blood draw, apply sterile cotton swabs to the puncture site for 5–10 minutes. Avoid raising the arm or rubbing the site during this time to prevent bleeding or hematoma formation.
