constituting or forming a large number; numerous: many people. noting each one of a large number (usually followed by a or an): For many a day it rained. a large or considerable number of persons or things: A good many of the beggars were blind. the many, the greater part of humankind. many persons or things: Many of the beggars were blind.
Hives and angioedema can be caused by: 1  Foods. Many foods can trigger reactions in people with sensitivities. 2  Medications. Almost any medication may cause hives or angioedema. 3  Common allergens. Other substances that can cause hives and angioedema include pollen, animal dander, latex and insect stings.  Environmental factors.
If you are an adult and have suffered from chronic hives your whole life, you may want to have your blood checked for these issues or other related conditions. What Causes Hives in Adults-The Food You Consume: We also know that the food you eat might be the culprit of an adult hives breakout.hat Causes Hives in Adults-The Immune System: What we do know is that hives in adults has a great deal to do with the immune system.