C-reactive protein (CRP) mass concentration in serum/plasma

Why CRP Matters in Your Health

CRP is a marker that signals your body’s immune response. High levels may indicate inflammation, which can be caused by infections, injuries, or certain health conditions like arthritis or heart disease. Your doctor may use this test to track how your body is responding to treatment or to check for hidden inflammation that doesn’t show other symptoms.

When This Test Is Ordered

Doctors often order CRP tests to monitor chronic conditions like rheumatoid arthritis or to check for infections, especially if symptoms aren’t obvious. It may also be used before or after surgery to assess risk or track recovery. Sometimes, it’s part of a general health screening to look for signs of inflammation.

What to Expect Before the Test

You’ll typically have blood drawn from a vein in your arm. The process is quick and usually doesn’t cause discomfort. No special preparation is needed, but let your doctor know if you’re on blood-thinning medications or have a bleeding disorder.

What the Results Mean

Results are usually reported in milligrams per liter (mg/L). A higher than normal level may signal inflammation, but it doesn’t always mean you have a specific condition. Your doctor will interpret the results in the context of your overall health and symptoms.