Next Slideshow Title
IMAGES PROVIDED BY:
(1) © moodboard / Corbis
(2) Steve Gschmeissner / Photo Researchers, Inc.
(3) Sharon Montrose / The Image Bank / Getty Images
(4) Sharon Montrose / The Image Bank / Getty Images
(5) © Jim Craigmyle / Corbis
(6) Eye of Science / Photo Researchers, Inc.
(7) John Kelly / Stone / Getty Images
(8) Jose Luis Pelaez, Inc / Blend Images / Getty Images
(9) Larry Williams / Blend Images / Getty Images
(10) Meg Takamura / IZA Stock / Getty Images
(11) John Howard / Lifesize / Getty Images
(12) Sami Sarkis / Photographer’s Choice RF / Getty Images
American College of Allergy, Asthma & Immunology web site.
American Kennel Club web site.
Heutelbeck, A. Journal of Toxicology & Environmental Health, 2008.
Hodson, T. Journal of Allergy and Clinical Immunology, April 1999.
Lipton, L. Psychiatric News, Feb. 2, 2001.
Merck Veterinary Manual web site.
Reviewed by Amy Flowers, DVM on May 19, 2018
This tool does not provide medical advice. See additional information.
THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.
View our slideshows to learn more about your health.