Good to knowOne result rarely tells the whole story. Your provider looks at your results together with your symptoms, exam, and other tests.
What the test is
CRP rises and falls quickly, so it's useful for tracking flares and response to treatment.
Why it's done
- Signs of infection or inflammation
- Following conditions like rheumatoid arthritis or inflammatory bowel disease
Getting ready and what happens
- No special preparation is needed.
How the test is done
- A health worker cleans the skin, puts a band around your arm, and draws blood from a vein with a small needle. It takes a few minutes.
What the results mean
| Result | Typical range for adults |
|---|---|
| Normal | Below about 1.0 mg/dL (10 mg/L); labs vary |
Normal ranges vary from lab to lab and can differ by age, sex, and pregnancy. Your report lists your lab's own range next to each result. A result a little outside the range is often not a problem.
High
Can come from infections, autoimmune disease, injury, or other inflammation. Very high levels often point to bacterial infection.
Questions to ask your provider
- What do my results mean for me?
- Do I need to repeat this test or have other tests?
- What's causing my inflammation?
- Should this be rechecked?
Risks
A blood draw is very safe. You may have slight pain or a small bruise where the needle went in.
Related conditions
Related tests
Sources
Last updated 2026-11-13.