The Hygiene Hypothesis: How Valid Is It?
Allergies are an overreaction of the immune system to substances that under normal circumstances would cause no reaction in most people. The results of this immunologic overreaction are symptoms such as rashes, sneezing, watery eyes, and itching.
Asthma is a disease in which the airways become narrowed or even blocked due to inflammation, causing wheezing, coughing, shortness of breath, breathing trouble, and other serious symptoms. In the case of a severe asthma attack, a person may need emergency treatment to restore normal breathing.
Last reviewedSeptember 2014by Michael Woods, MD
Please be aware that this information is provided to supplement the care provided by your physician. It is neither intended nor implied to be a substitute for professional medical advice. CALL YOUR HEALTHCARE PROVIDER IMMEDIATELY IF YOU THINK YOU MAY HAVE A MEDICAL EMERGENCY. Always seek the advice of your physician or other qualified health provider prior to starting any new treatment or with any questions you may have regarding a medical condition.