A CRP test measures C-reactive protein in the blood, which rises when there is inflammation or infection in the body.

When should I take a CRP test?

If you have signs of infection, chronic pain, unexplained fever, or if your doctor wants to monitor a condition, a CRP test is recommended.

What causes high CRP levels?

High CRP levels may result from bacterial infections, autoimmune conditions, inflammatory diseases, or cardiovascular problems.

Do I need to fast for a CRP test?

Fasting is not typically required for a CRP test unless other tests are done alongside it.

Where can I get a CRP test done in India?

CRP tests are available through labs like Thyrocare, which you can access easily via platforms like SecondMedic for home collection.

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Published on: Jul 07, 2025
3 minute read
By: Secondmedic Expert

CRP Test Meaning And When To Do It

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If you’ve recently had blood work or your doctor suspects an infection or inflammation, they may have recommended a CRP test. But what is it? Why is it important? And when exactly should you get it done?

Let’s simplify the medical jargon and walk you through the CRP test meaning and when to do it, especially in the Indian healthcare context.

What Is a CRP Test?

CRP stands for C-reactive protein. It is a substance produced by your liver in response to inflammation in the body.

The CRP test is a blood test that measures the amount of C-reactive protein in your blood. High levels of CRP usually mean there’s inflammation in your body, which could be due to an infection, injury, or a chronic disease like arthritis.

High CRP = Inflammation Alert

This test doesn’t tell you what’s causing the inflammation—it simply tells you that something is wrong, and further testing might be needed.

What Does the CRP Test Detect?

While CRP is a general marker, it is helpful in detecting:

Bacterial or viral infections
Autoimmune disorders like rheumatoid arthritis or lupus
Inflammatory bowel diseases
COVID-19 severity
Heart disease risk (especially with high-sensitivity CRP or hs-CRP)

When Should You Do a CRP Test?

You should get a CRP test done when:

You have fever or chills that won’t go away
You’re showing signs of infection like cough, swelling, or pain
Your doctor is monitoring an autoimmune disease
You’re recovering from surgery or injury
Your doctor is checking inflammation due to chronic disease
You are showing COVID-like symptoms (to assess severity)

Normal CRP Levels:

CRP Level	Interpretation
Below 1 mg/L	Low risk of inflammation
1–3 mg/L	Moderate risk
Above 3 mg/L	High inflammation or infection present
Above 10 mg/L	May indicate serious infection or disease

Note: For heart disease risk, a high-sensitivity CRP (hs-CRP) test is used.

Is Fasting Required for the CRP Test?

No, fasting is not required. You can take the CRP test at any time of day, unless it is being done with other tests that require fasting (like blood sugar or cholesterol).

Lab Tests Packages Including CRP

You can book a CRP test alone or as part of a health package via SecondMedic.com, powered by Thyrocare:

Basic CRP Test

Detects inflammation/infection
Simple blood draw
Home sample collection

COVID Monitoring Panel

CRP, D-Dimer, Ferritin, CBC
Recommended if you have COVID symptoms or are recovering

Inflammation Panel

CRP + ESR + CBC + Liver Profile
For those with chronic fatigue, joint pain, or autoimmune diseases

Lifestyle Tips If Your CRP is High

A high CRP may indicate ongoing inflammation. Along with medical treatment, here are some tips:

Eat more fruits, vegetables, and whole grains
Cut down on sugar and processed food
Include omega-3 rich foods like flaxseed and fish
Exercise regularly
Manage stress and sleep better
Quit smoking and limit alcohol

5 Most Asked Questions About the CRP Test

1. What is the CRP test used for?

CRP tests are used to check for inflammation due to infections, autoimmune diseases, and to monitor treatment effectiveness.

2. What causes a high CRP level?

Infections, chronic inflammation, surgery, injuries, and lifestyle diseases like diabetes and heart disease.

3. Is a CRP test painful?

No. It’s a simple blood test and usually takes just a few minutes.

4. How long does it take to get CRP test results?

Most labs deliver CRP results within 24 to 48 hours.

5. Can CRP levels return to normal?

Yes, with proper treatment and lifestyle changes, CRP levels can go back to the normal range.

Booking a CRP Test Online (Thyrocare via SecondMedic)

Here’s how you can book it:

Go to www.secondmedic.com
Search for "CRP Test – Thyrocare"
Select home sample collection
Enter your location and schedule pickup
Get digital results within 1–2 days

Conclusion

The CRP test is a simple, affordable, and powerful tool to detect inflammation early. Whether you’re dealing with an infection, monitoring a chronic condition, or recovering from illness, this test gives your doctor a clearer picture of what’s happening inside your body.

Don’t ignore signs like unexplained fever, fatigue, or body pain. Get tested.

If you’re wondering about CRP test meaning and when to do it — the answer is simple: whenever inflammation or infection is suspected, this test is your body's alert system.

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Read FAQs

A. A CRP (C-reactive protein) test is a blood test that detects inflammation in your body. It’s used to monitor infections, autoimmune diseases, or heart conditions.

A. You should get a CRP test if you have symptoms like high fever, fatigue, swelling, or suspected infection, or if your doctor is monitoring a chronic condition.

A. A high CRP level indicates inflammation, which could be due to infections, autoimmune diseases (like rheumatoid arthritis), or heart problems.

A. No, fasting is generally not needed for a CRP test. It can be done at any time of the day unless your doctor advises otherwise.

A. You can book a CRP test through diagnostic partners like Thyrocare via SecondMedic.com, with home sample collection and quick results.

Read Blog

Shortness of Breath Causes: From Common Triggers to Serious Health Conditions

Shortness of breath, medically known as dyspnea, is a symptom that ranges from mild discomfort during exertion to a distressing sensation of not getting enough air. In India, increasing air pollution, lifestyle diseases and respiratory infections have made breathlessness a frequent complaint across age groups. Understanding shortness of breath causes is essential to identify when it is harmless and when it signals a medical emergency.

What Is Shortness of Breath?

Shortness of breath refers to difficulty breathing or a feeling of air hunger.

It may present as:

rapid breathing
shallow breathing
tightness in the chest
inability to take a deep breath

The sensation can develop suddenly or gradually.

Common and Benign Causes of Shortness of Breath

Physical Exertion

During exercise, the body demands more oxygen.

Temporary breathlessness during:

climbing stairs
running
heavy physical work

is normal and resolves with rest.

Anxiety and Panic Attacks

Stress and anxiety alter breathing patterns.

Symptoms include:

rapid breathing
chest tightness
dizziness

These episodes often resolve with calming techniques.

Respiratory Causes of Shortness of Breath

Asthma

Asthma causes airway narrowing and inflammation.

Symptoms include:

wheezing
chest tightness
breathlessness during exertion or at night

Asthma is a leading cause of chronic breathlessness.

Chronic Obstructive Pulmonary Disease

COPD includes chronic bronchitis and emphysema.

Risk factors include:

smoking
indoor air pollution
occupational exposure

WHO identifies COPD as a major cause of breathlessness in adults.

Respiratory Infections

Infections such as pneumonia and bronchitis reduce lung capacity.

Breathlessness may be accompanied by:

cough
fever
chest pain

Severe infections require urgent treatment.

Heart-Related Causes of Shortness of Breath

Heart Failure

The heart fails to pump blood efficiently.

This leads to:

fluid accumulation in lungs
breathlessness on exertion
breathlessness while lying flat

ICMR data shows heart disease as a major contributor to unexplained breathlessness.

Coronary Artery Disease

Reduced blood supply to the heart can cause:

breathlessness
chest discomfort
fatigue

This may occur even without chest pain in some individuals.

Blood and Metabolic Causes

Anemia

Low hemoglobin reduces oxygen delivery.

Common symptoms include:

fatigue
breathlessness on mild activity
pale skin

NFHS-5 highlights anemia as highly prevalent in India.

Thyroid Disorders

Hyperthyroidism increases metabolic demand, causing breathlessness.

Hypothyroidism may contribute indirectly through weight gain and reduced stamina.

Lung Circulation Disorders

Pulmonary Embolism

A blood clot in the lungs causes sudden, severe breathlessness.

This is a medical emergency and may be accompanied by:

chest pain
coughing blood
fainting

Immediate treatment is critical.

Lifestyle-Related Causes

Obesity

Excess body weight restricts lung expansion.

Breathlessness occurs due to:

increased oxygen demand
reduced lung volumes

Weight management improves breathing efficiency.

Sedentary Lifestyle

Poor physical conditioning reduces respiratory muscle strength.

Even mild exertion may cause breathlessness.

Environmental and Occupational Factors

Air Pollution

Pollutants irritate airways and reduce lung function.

Urban populations experience higher rates of breathlessness.

Workplace Exposure

Dust, chemicals and fumes increase respiratory risk.

Protective measures are essential in high-risk occupations.

When Shortness of Breath Is a Warning Sign

Seek urgent care if breathlessness:

starts suddenly
worsens rapidly
occurs at rest
is associated with chest pain, bluish lips or confusion

These may indicate life-threatening conditions.

How Shortness of Breath Is Diagnosed

Evaluation may include:

physical examination
chest imaging
blood tests
lung function tests
heart evaluation

Diagnosis focuses on identifying the root cause.

Preventive Measures and Lifestyle Care

Prevention includes:

regular physical activity
pollution protection
smoking cessation
weight control
managing chronic conditions

Preventive healthcare reduces long-term risk.

Importance of Early Medical Evaluation

Delayed diagnosis can worsen outcomes, especially in:

heart disease
lung infections
anemia

Early care improves treatment success.

Conclusion

Shortness of breath causes range from temporary exertion and anxiety to serious heart, lung and blood disorders. While occasional breathlessness may be harmless, persistent or sudden symptoms should never be ignored. Understanding the underlying causes and seeking timely medical evaluation can prevent complications and save lives. Paying attention to changes in breathing is an essential step toward protecting overall health and wellbeing.

References

Indian Council of Medical Research (ICMR) – Respiratory and Cardiac Health Reports
World Health Organization (WHO) – Breathlessness and Chronic Disease Guidelines
National Family Health Survey (NFHS-5) – Anemia and Respiratory Health Data
Lancet – Dyspnea Evaluation and Outcomes Research
NITI Aayog – Non-Communicable Disease Prevention Reports
Statista – Respiratory Disease and Air Pollution Trends

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