Asthma & Allergy Associates, P.C.

Colorado Springs Asthma and Allergy Clinic

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Runny nose, sneezing, congestion, and fatigue are common during winter and early spring. But how do you know whether you’re dealing with a common cold, the flu, or allergies? While symptoms may overlap, the cause and the right treatment can be very different.

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Is it a Cold, the Flu, or Allergies? How to tell the difference

Common Cold

The common cold is caused by a virus and usually develops gradually.

Symptoms may include:

  • Stuffy or runny nose
  • Sneezing
  • Sore throat
  • Mild cough
  • Mild fatigue

Colds typically last 3–10 days and usually do not cause a high fever in adults.

Resource: acaai.org/resource

Influenza (Flu)

The flu is also caused by a virus, but symptoms are usually more severe and appear suddenly.

Symptoms may include:

  • High fever
  • Chills
  • Muscle or body aches
  • Headache
  • Severe fatigue
  • Dry cough

Flu symptoms can last 1–2 weeks or longer and may lead to complications, especially in people with asthma or chronic conditions.

Resource: mayoclinic.org

Allergies

Allergies are not caused by a virus. They occur when the immune system reacts to allergens such as pollen, dust mites, mold, or pet dander.

Symptoms may include:

  • Sneezing
  • Clear runny nose
  • Nasal congestion
  • Itchy eyes, nose, or throat
  • Watery eye

Allergies do not cause fever, and symptoms may last weeks or months if exposure continues.

Resource: acaai.org

Key Differences at a Glance

  • Fever: flu (yes), cold (rare), allergies (no)
  • Itchy eyes: allergies
  • Body aches: flu
  • Long-lasting symptoms: allergies

When to See an Allergy & Immunology Specialist

You should consider seeing an allergist if:

  • Symptoms keep coming back
  • You’re frequently “sick.”
  • Medications aren’t working
  • You have asthma or recurrent infections
  • You’re unsure what’s triggering symptoms

An allergist can identify triggers, rule out immune conditions, and create a personalized treatment plan.

If you’re not sure what’s causing your symptoms, we’re here to help. Schedule a consultation with Asthma and Allergy Associates. Our experts can help you build a plan tailored to your needs.