Heredity, environmental conditions, number and type of exposures and emotional factors can indicate a predisposition to allergies.
Review Date: 6/29/2010 Reviewed By: Paula J. Busse, MD, Assistant Professor of Medicine, Division of Clinical Immunology, Mount Sinai School of Medicine, New York, NY. Review provided by VeriMed Healthcare Network. David Zieve, MD, MHA, Medical Director, A.D.A.M., Inc.