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Sore Throat From Flu vs. Allergies: How To Tell The Difference

March 10, 2025

A sore throat can be an uncomfortable and frustrating symptom, but it doesn’t always mean the same thing. If you’re experiencing throat pain, you might be wondering whether it’s caused by the flu or seasonal allergies. While both conditions can lead to irritation, they have distinct causes, symptoms, and treatments. In this blog, we’ll explore how to understand the differences so you can take the right steps toward relief.

For same-day illness testing and treatment, visit the walk-in clinic at AFC Urgent Care Denver University Hills. Our team is here seven days a week to provide quality, affordable, and convenient care! Walk in or plan your visit in advance below.

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Sore Throat From The Flu vs. Allergies

The flu, caused by the influenza virus, leads to inflammation in the throat as the body fights off the infection. This sore throat is often accompanied by other symptoms such as fever, body aches, and fatigue. The flu spreads through respiratory droplets, making it highly contagious.

On the other hand, seasonal allergies occur when the immune system reacts to allergens like pollen, dust mites, or mold spores. When allergens enter the body, they trigger an inflammatory response, leading to postnasal drop, which can cause throat irritation. Unlike the flu, allergies are not contagious and are often seasonal.

Key Symptoms: How To Tell The Difference

If your sore throat is due to the flu, you’re likely to experience the following symptoms:

  • Fever
  • Body aches and chills
  • Fatigue and weakness
  • Dry or productive cough
  • Headache
  • Congestion or runny nose

If allergies are the cause of your sore throat, symptoms may include:

  • Itchy or watery eyes
  • Sneezing
  • Nasal congestion or runny nose
  • Postnasal drip
  • No fever or body aches

Flu symptoms typically develop suddenly and can last between 5 to 7 days, with fatigue lingering for weeks in some cases. Allergy symptoms persist as long as you’re exposed to the allergen. Seasonal allergies can last for weeks or even months, depending on pollen levels.

Treatment and Relief Strategies

For a flu-related sore throat, be sure to:

  1. Rest and stay hydrated to help your body fight the virus
  2. Use throat lozenges and warm teas to soothe irritation
  3. Take over-the-counter pain relievers to manage discomfort
  4. Seek medical attention if symptoms worsen or persist beyond a week

For an allergy-related sore throat, you can:

  1. Avoid known allergens by staying indoors on high-pollen days
  2. Use antihistamines to reduce your body’s allergic response
  3. Try nasal sprays or saline rinses to clear allergens from your nasal passages
  4. Use air purifiers to reduce allergens in your home

Get Same-Day Symptom Relief at AFC Urgent Care Denver University Hills

If you’re unsure whether your sore throat is from the flu or allergies, it’s best to consult a healthcare provider for a professional diagnosis. At AFC Urgent Care Denver University Hills, we’re here to help you find relief. Whether you’re dealing with flu symptoms or seasonal allergies, our experienced medical team can diagnose and treat your condition with no appointment necessary. We provide treatment both in-person and via telemedicine– 7 days a week. Don’t ignore your symptoms– visit us today! We accept most health insurance plans and offer low-cost options for self-paying patients. If you have any additional questions about sore throat treatment, or other services we provide, please contact our medical team directly at (303) 756-4500.

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