Anaphylaxis is a severe, potentially life-threatening allergic reaction caused by contact with certain triggers such as: foods, medications, insect venom or latex. Anaphylaxis can also be caused by physical exercise, as well, if you have history of asthma.
Examples of triggers: Foods (especially peanuts or seafood), medications, insect venom or latex
While a normal response to an insect sting may consist of reddening and some pain , an anaphylactic response is much more serious and can involve changes in breathing and loss of consciousness.
It is found in a wide range of manufactured goods, including an estimated 40,000 common household items. Latex allergies now affect an estimated 1% to 6% of the U.S. population and the reasons for the increase in incidence can be attributed to biohazard precautions and manufacturing changes.
Although the exact incidence of medication allergies is unknown, serious allergic reactions to medications cause the most allergy-associated deaths in the United States every year. Common medications that induce allergic reactions include antibiotics and some heart medications, though there are many other drugs that can cause an allergic response.
Idiopathic anaphylaxis is a potentially life-threatening allergic reaction that occurs in the absence of any known allergen. In simpler terms, nobody really knows what causes idiopathic anaphylaxis.