High C-Reactive Protein (CRP): Causes & When to Worry
What does a high CRP blood test mean? Learn the difference between viral infections, autoimmune disease & cardiac risk markers. Doctor reviewed.
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About CRP Blood Test: Why High C-Reactive Protein Means Inflammation with Healthians
C-Reactive Protein (CRP) is an acute-phase reactant synthesized by the liver. When tissues in your body experience acute bacterial invasion, viral trauma, or autoimmune flare-ups, liver cells flood the bloodstream with CRP. Discover how doctors interpret this critical diagnostic signal.
- Normal standard CRP is under 5.0 to 6.0 mg/L (or under 10 mg/L in some labs)
- Mild elevation (10 - 40 mg/L): Viral infections, mild inflammation, pregnancy, or obesity
- Moderate to severe elevation (40 - 200 mg/L): Acute bacterial infection, pneumonia, or severe autoimmune flares
- Very high (>200 mg/L): Severe systemic bacterial sepsis or major trauma
- High-Sensitivity CRP (Hs-CRP) measures tiny cardiac risk elevations below 3.0 mg/L
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