Your provider may also order the test if he or she thinks you have an inflammatory condition or an autoimmune disease, such as rheumatoid arthritis. CRP levels are higher in people with these conditions.
This test may also be used to watch flare-ups and recovery. Symptoms of rheumatoid arthritis include joint swelling and pain, morning stiffness, tiredness, weight loss, and low-grade fevers.
If you are being treated for a long-term inflammatory condition or an infection, this test may be used to see if the treatment is working.
The more specialized CRP test for heart disease risk is not covered in this article. Because the CRP test tells you only if you have inflammation and doesn't pinpoint what is causing it, your healthcare provider will likely order more tests.
These may include:. Erythrocyte sedimentation rate ESR test. Like the CRP, this test measures inflammation. It's not as sensitive as the CRP. But it's easy to do and gives more information.
So many healthcare providers will order it at the same time. Antinuclear antibody ANA test. The ANA test measures autoantibodies that attack your cells. Results for an hs-CRP test are usually given as follows:. A person's CRP levels vary over time. A coronary artery disease risk assessment should be based on the average of two hs-CRP tests, ideally taken two weeks apart.
Values above 2. Remember that your hs-CRP level is only one risk factor for coronary artery disease. If you have a high hs-CRP level, it doesn't definitely mean you have an overall higher risk of developing heart disease.
Other tests need to be done to further evaluate your risk. Talk to your doctor about all your risk factors and ways you can try to prevent coronary artery disease and a heart attack. Your doctor might recommend lifestyle changes or medications to decrease your risk of a heart attack.
Mayo Clinic does not endorse companies or products. Advertising revenue supports our not-for-profit mission. This content does not have an English version. This content does not have an Arabic version. Sections for C-reactive protein test About. More Information Adult Still's disease Essential thrombocythemia Giant cell arteritis Juvenile idiopathic arthritis Polymyalgia rheumatica Takayasu's arteritis Show more related information. Heart attacks can produce a number of different signs and sensations….
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Health Conditions Discover Plan Connect. C-Reactive Protein Test. Medically reviewed by Judith Marcin, M. What is C-reactive protein? C-reactive protein CRP is a substance produced by the liver in response to inflammation.
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