What is the normal value of CRP?

Aug 22, 2025 Source: Cainiu Health

Dr. Liu Feng

Introduction

CRP usually refers to C-reactive protein. Under normal circumstances, the normal value of C-reactive protein is generally <2.87 mg/L for adults and children; ≤47 mg/L for pregnant women, ≤0.6 mg/L for newborn umbilical cord blood; and ≤1.6 mg/L for infants from the 4th day after birth to 1 month of age. If discomfort symptoms occur, it is recommended to seek timely consultation and treatment at a正规 hospital.

CRP generally refers to C-reactive protein. Under normal circumstances, the reference range for C-reactive protein is usually <2.87mg/L for adults and children; ≤47mg/L for pregnant women, ≤0.6mg/L for newborn umbilical cord blood; and ≤1.6mg/L for infants aged 4 days to 1 month after birth. If discomfort symptoms occur, it is recommended to seek timely consultation and treatment at a qualified hospital. Detailed analysis is as follows:

C-reactive protein levels vary depending on the population. The normal value is generally <2.87mg/L for adults and children; for pregnant women, who are in a special physiological state, the upper limit of the normal value is relatively higher at ≤47mg/L; the index in newborn umbilical cord blood is ≤0.6mg/L; and for infants aged 4 days to 1 month after birth, the level is ≤1.6mg/L. These value ranges are important references for clinicians to determine whether there are abnormal conditions such as inflammation or infection in the body. When values exceed the corresponding range, it may indicate the presence of infection, trauma, or other pathological conditions in the body, and further examination should be conducted in combination with specific symptoms.

Fasting is not required before testing for C-reactive protein; however, factors that may affect the results, such as strenuous exercise or staying up late, should be avoided before testing. If the test result exceeds the normal range, do not self-diagnose the condition; instead, promptly consult a doctor to identify the cause by combining other tests and symptoms, and then proceed with targeted treatment. Additionally, a single abnormal test result should not cause excessive concern; follow-up testing can be performed as directed by a physician to confirm the condition.

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What does an elevated C-reactive protein indicate?

Elevated C-reactive protein (CRP) levels often indicate the presence of inflammation or infection in the body, with infections being a common cause. In bacterial infections such as pneumonia or urinary tract infections, CRP levels typically rise significantly within a short period, and the degree of elevation correlates with the severity of the infection. In viral infections, CRP elevation is usually mild, making it a useful reference for differentiating between types of infections.

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CRP greater than 40 mg/L indicates what type of infection?

Bacterial infection of the lungs triggers inflammation, stimulating the immune system to produce a large amount of CRP, accompanied by high fever, cough, expectoration of purulent sputum, and chest pain. Anti-infective treatment with Amoxicillin and Clavulanate Potassium Tablets, Ceftriaxone Sodium Injection, and Levofloxacin Injection should be administered as directed by a physician. Bacterial invasion of the renal pelvis and renal parenchyma leads to infection, with inflammation causing elevated CRP levels.

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What medications can be taken for high CRP?

Under normal circumstances, elevated CRP levels often indicate the presence of an inflammatory response in the body. Commonly used medications generally include Amoxicillin Capsules, Cefuroxime Axetil Tablets, Ibuprofen Sustained-Release Capsules, Prednisone Tablets, and Levofloxacin Tablets. The choice of medication should be based on the cause and type of inflammation. Amoxicillin Capsules belong to the penicillin class of antibiotics and are suitable for elevated CRP levels caused by bacterial infections.

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What does it mean if a child's CRP level is high?

In general, elevated CRP levels in children may be caused by factors such as intense physical activity, after vaccination, acute upper respiratory tract infection, acute bronchitis, or acute pyelonephritis. It is recommended to seek medical attention promptly, identify the underlying cause, and receive symptomatic treatment under a doctor's guidance. Daily care should ensure the child gets adequate rest, avoids excessive fatigue, and follows a light, easily digestible diet.