Raised CRP without symptoms: what can it mean?

You get your blood result and your CRP sits just above the reference, while you feel perfectly fine. That is confusing, because you link inflammation with being ill. Yet a slightly raised CRP without symptoms is often harmless. CRP reacts to many things and rises within hours of a trigger (Sproston 2018). In our experience that reassures people: the number is a starting point, not a verdict.

This article belongs to the overview about inflammation markers in your blood and covers a raised CRP without clear symptoms.

Why can CRP be raised without you noticing?

CRP is a sensitive protein that reacts to many things, not only illness. A cold that just passed, a hard workout or a small wound can lift the value temporarily. You feel fine, while your blood still shows your immune system was recently active. Lifestyle factors matter too: extra weight, smoking and little movement are linked to a slightly raised CRP, fitting the idea of low-grade inflammation covered in chronic low-grade inflammation.

Harmless and less harmless causes

The right column is not cause for alarm, but a reason to involve your GP. A raised CRP gains meaning together with your symptoms and sometimes a second measurement.

When is repeating useful?

Because CRP reacts fast, a single raised value is often a snapshot. A repeat after a few weeks shows whether it was a spike or whether the value stays up. If your CRP stays raised without a clear reason, that is a reason to look further with your GP.

Imagine you had CRP drawn two days after flu. The value is raised, but a repeat three weeks later reads normal. Then the explanation was simple. That is exactly why one measurement is rarely enough.

What can you do yourself?

The main thing is not to panic and not to self-treat. Instead, track your situation for a few weeks: did you have a recent infection, exercise hard, or notice a change in weight or energy? To follow your value, you can measure at Vitalcheck without a referral in the basic health checkup, or look broader with the extended health checkup. The exact limits are on the CRP page. Every result is reviewed by a BIG-registered doctor.

References

• Sproston NR, Ashworth JJ. Role of C-Reactive Protein at Sites of Inflammation and Infection. Front Immunol. 2018. PMID: 29706967.
• Furman D, et al. Chronic inflammation in the etiology of disease across the life span. Nat Med. 2019. PMID: 31806905.
• Thuisarts.nl. About blood testing.

Every blood test result includes a professional assessment from a BIG-registered doctor. For treatment decisions, discuss your results with your GP.