C-reactive protein (CRP) assay, high-sensitivity

Why hs-CRP Matters in Sudden Illness or Injury

hs-CRP (high-sensitivity C-reactive protein) is a blood test that helps doctors detect subtle signs of inflammation—even when other symptoms aren’t obvious. It’s particularly useful after sudden injuries or illnesses because inflammation can occur before you feel symptoms like pain or fever.

How the Test Works

Your blood sample is tested for tiny amounts of CRP, a protein produced by your liver in response to inflammation. The test uses a sensitive method to measure these levels, often in milligrams per liter (mg/L).

When Your Doctor Might Order This Test

Doctors may order hs-CRP if you’ve had a recent injury (like a broken bone or soft tissue trauma), surgery, or illness (such as a viral infection or flare-up of a chronic condition). It can also help monitor long-term inflammation in conditions like heart disease or autoimmune disorders.

What the Results Mean

Results are typically reported as a numerical value, but your doctor will interpret them based on your overall health and symptoms. Very high levels may indicate severe inflammation, while low levels suggest minimal inflammation. Your doctor will discuss what your result means in the context of your care plan.