Cold, Flu, or COVID? How to Tell the Difference This Winter

During the winter months, coughs, sore throats, and stuffy noses seem to be everywhere. Because cold, flu, and COVID-19 symptoms often overlap, it can be difficult to know which illness you’re dealing with. Understanding the differences can help you choose the right care, know when to test, and prevent spreading illness to family, coworkers, and friends.

Below, we break down common symptoms, how each illness typically starts, and when to seek help. As always, your local Hawthorne Pharmacy team is here to support you with guidance, over-the-counter product recommendations, and answers to your questions.

Why These Illnesses Are So Common in Winter

Cold viruses, influenza viruses, and the virus that causes COVID-19 spread more easily during cooler months. People spend more time indoors, in close contact, and in dry air that can irritate the throat and nasal passages—making it easier for germs to enter the body.

Understanding what type of illness you have can help you respond quickly and reduce the chance of spreading it to others.

Common Cold: Usually Mild but Annoying

A cold is typically the mildest of the three illnesses.

Common symptoms include:

  • Stuffy or runny nose
  • Sneezing
  • Mild sore throat
  • Cough
  • Mild fatigue
  • Less common symptoms include:
  • Fever (usually low-grade if present)
  • Headache or body aches

Colds usually develop gradually over a day or two and most people feel well enough to continue daily activities, though rest is helpful. Symptoms often peak within 2–3 days and improve over about a week.

The Flu: Sudden and More Intense Symptoms

The flu (influenza) is typically more intense than a cold.

Common symptoms include:

  • Fever or chills
  • Sudden onset of fatigue
  • Body aches and muscle pain
  • Headache
  • Dry cough
  • Sore throat

People often describe flu symptoms as being “hit by a truck” because they come on suddenly and can be severe. Some individuals experience nausea or vomiting, especially children.

The flu may lead to complications, especially in older adults, young children, pregnant individuals, and people with chronic health conditions. If symptoms are severe or you are in a high-risk group, contact your healthcare provider.

COVID-19: Symptoms Can Vary Widely

COVID-19 symptoms can range from very mild to severe and may overlap with both cold and flu.

Possible symptoms include:

  • Fever or chills
  • Cough
  • Shortness of breath or difficulty breathing
  • Fatigue
  • Sore throat
  • Headache
  • Congestion or runny nose
  • Nausea, vomiting, or diarrhea
  • Unique symptoms sometimes seen:
  • Loss of taste or smell

Some people have only one or two symptoms, while others feel very ill. Because symptoms vary so much, testing is the best way to confirm COVID-19.

Key Differences at a Glance

Onset:

  • Cold – gradual
  • Flu – sudden
  • COVID – varies

Fever:

  • Cold – uncommon or mild
  • Flu – common
  • COVID – common

Loss of taste or smell:

  • Cold – possible with congestion
  • Flu – less common
  • COVID – more likely

Because symptoms overlap, testing may be needed to know for sure—especially if you’ve been exposed or are high-risk.

When Should You Seek Medical Care?

Contact a healthcare provider urgently if you experience:

  • Difficulty breathing
  • High fever that won’t come down
  • Chest pain or pressure
  • Confusion
  • Severe dehydration
  • Symptoms that worsen instead of improve after several days

Children, older adults, pregnant individuals, and people with chronic medical conditions should be especially cautious.

How to Protect Yourself and Others

Simple everyday habits help reduce the spread of all three illnesses:

  • Wash your hands regularly
  • Cover coughs and sneezes
  • Stay home when sick
  • Clean commonly touched surfaces
  • Keep up to date on recommended vaccinations

Your Hawthorne Pharmacy Is Here to Help

If you’re unsure whether you’re dealing with a cold, the flu, or COVID-19, you’re not alone. Our knowledgeable pharmacists at Hawthorne Pharmacy are here to help you:

  • Understand your symptoms
  • Select appropriate over-the-counter relief options
  • Review medications for interactions
  • Provide guidance on when testing or medical care may be needed

If your symptoms persist or worsen, or if you’re concerned about your health, stop by or give us a call—we’re always happy to assist.

Paying attention to symptom type, severity, and how quickly they begin—along with testing when appropriate—can help you get the right care and protect those around you.

Back to Blog List