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Are you sure it's an allergy?

Last reviewed: March 2010

Proper allergy treatment starts with an accurate diagnosis. But distinguishing between allergies and other ailments can be hard. For example, all the conditions below can cause sneezing, congestion, and a runny nose. To identify your ailment, focus on the hallmark symptoms of each as well as the other characteristics that can help differentiate the diseases.

  Hallmark symptoms Other possible symptoms Duration
Allergies
 Itchy eyes or nose
 Scratchy or ticklish
throat
 Watery nasal discharge
 Watery eyes
 Cough
 Headache
 Fatigue
Usually weeks to months. Symptoms worsen when exposed to offending substances or at certain times of the year.
Cold
 Sore throat
 Hacking cough
 Watery to thick cloudy
or white nasal discharge
 Low-grade fever
 Mild fatigue and body
aches
3 days to 2 weeks
Flu
 Fever of 102º F
(39º C) or higher
 Headache
 Exhaustion
 Extreme body aches
 Sore throat
 Dry, hacking cough
2 to 5 days for initial severe symptoms; cough and fatigue can linger 2 to 3 weeks longer
Sinusitis
 Pain or pressure in the
face, eyes, or upper teeth
 Thick, discolored nasal
discharge
 Cold symptoms that
last 10 days or more
 Headache
 Sore throat
 Fever
 Cough, especially at
night
 Fatigue
Up to 12 weeks; less-common chronic form can linger much longer
Bronchitis
Cold-like symptoms that develop into a deep, painful cough that produces yellow or green phlegm. Often worse at night.
 Fever up to 102º F
 Wheezing
 "Rattling" in chest
 Chest is sore or
constricted
3 to 5 days for fever and most other symptoms; cough may continue for several weeks
Source: Consumer Reports On Health, September 2007
 
 
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