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How to Tell the Difference Between a Cold and the Flu
Category: Urgent Care|Reading Time: 5–6 Minutes
Cold or Flu: How Can You Tell?
A cold and the flu are both contagious respiratory illnesses, and their symptoms can look very similar. However, flu symptoms usually appear more suddenly and tend to be more intense than those of a common cold.
Knowing the common differences can help you understand your symptoms and know when it may be time to seek medical care.
Common Cold Symptoms
Cold symptoms are generally milder and often develop gradually. Common symptoms include:
- Runny or stuffy nose
- Sneezing
- Sore throat
- Mild cough
- Mild fatigue
- Occasional headache
- Mild body aches
Fever is less common with a cold, and most people continue with their normal activities despite feeling unwell.
Common Flu Symptoms
The flu often comes on suddenly and can make you feel significantly more unwell. Symptoms may include:
- Fever
- Chills
- Headache
- Muscle or body aches
- Significant fatigue
- Dry cough
- Sore throat
- Runny or stuffy nose
Fatigue and weakness can sometimes continue even after the other symptoms begin to improve.
Cold vs. Flu: Key Differences
How Symptoms Start
Cold symptoms usually develop gradually, while flu symptoms often appear suddenly.
Fever
Fever is uncommon with a cold but is common with the flu.
Body Aches
Mild aches may occur with a cold. Flu-related aches are often more noticeable.
Fatigue
A cold may cause mild tiredness, while the flu can cause significant exhaustion.
Nasal Symptoms
Runny or stuffy noses are more common with colds than with the flu.
Cough
Coughing can happen with both illnesses but may be more pronounced with the flu.
How Can You Feel Better?
Most mild respiratory illnesses can be managed with rest, fluids, and appropriate symptom relief.
Stay Hydrated
Drink plenty of fluids to help prevent dehydration.
Get Plenty of Rest
Give your body time to recover and avoid strenuous activity while you're feeling unwell.
Monitor Your Symptoms
Pay attention to changes in fever, breathing, pain, or overall condition.
Talk With Your Provider
If your symptoms are severe, worsening, or you're at higher risk for complications, contact your healthcare provider.
For some people with influenza, antiviral treatment may be appropriate, particularly when started early.
When Should You See a Doctor?
Consider contacting a healthcare provider if your symptoms are severe, getting worse, or not improving as expected.
Seek prompt medical attention if you experience:
- Trouble breathing
- Chest pain or pressure
- Severe weakness or confusion
- Persistent or worsening symptoms
- A high or persistent fever
- Symptoms that improve and then become worse
People with certain chronic health conditions may also have a higher risk of complications from the flu and should contact their provider when they become sick.
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