Very common: This is always a difficult diagnosis since differentiating between infections and allergic responses is not always straight-forward. Allergy can easily produce sinus congestion and other symptoms.
Answered 12/29/2012
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
3 doctors weighed in across 2 answers
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