Question 1

What CRP level is dangerous?

Accepted Answer

There is no single danger number, because the cause matters more than the value. Results above 10 mg/L suggest an active infection or inflammation, and very high results (often above 100 mg/L) are common with serious bacterial infections. If a high CRP comes with fever, severe pain, shortness of breath or feeling very unwell, seek medical care promptly.

Question 2

Can stress or exercise raise CRP?

Accepted Answer

A very hard or long workout can raise CRP for a day or two, and long-term stress and poor sleep are linked with slightly higher levels. Avoid intense exercise the day before an hs-CRP test so the result reflects your usual level.

Question 3

Is a high hs-CRP a sign of heart disease?

Accepted Answer

Not on its own. An hs-CRP above 3 mg/L, measured when you are well, is linked with higher cardiovascular risk and can tip the balance when your clinician weighs cholesterol, blood pressure, smoking, diabetes and family history.

Question 4

How long does it take CRP to go down?

Accepted Answer

Once the cause settles, CRP roughly halves every day, so it usually returns toward normal within one to two weeks after an infection clears. Persistently raised levels need a look for an ongoing cause.