Allergic Reactions

A-Z Guide

Allergies (Allergic Rhinitis)
Allergies tend to run in families. Asthma, eczema (atopic dermatitis), and allergic rhinitis (hay fever) often occur in... »
Food Allergies
Food allergy is the name given to a variety of situations in which specific foods provoke some type of over-zealous... »
Hives
Hives are a sign that the whole body is experiencing a hypersensitivity reaction. Hives occur when the body's... »
Wheezing
Wheezing is the noise made by air moving through tight airways in the chest. Classically, wheezing is heard when... »

Q&A

Cold Allergies and What Can Be Done About Them
Can a person be allergic to cold temperatures? Believe it or not, it’s true. And this (and other allergies) can be... »
Fatal Nut Allergy
For some types of allergies, a process called desensitization is effective. Desensitization involves administering very... »
Milk and Constipation
Many people, doctors included, have only recently learned about the link between constipation and milk intolerance.... »
Mosquito Bites
When the mosquito stabs her needle-like mouthparts through the skin of her victim, she injects her saliva -- teeming... »
The Difference between Colds and Allergies
Parents often ask me whether their children's constantly runny noses are the result of allergies, sinus infections, or... »
Treating Bee Stings
Did you know that bee stings have been a nuisance long enough to have appeared in prehistoric cave paintings in Spain?... »