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.
But it doesnât do so entirely on its own. It's more likely that stress can cause or exacerbate and outbreak of hives. Hives are usually caused when the body responds to an allergen which prompts the release of histamine and thus the appearance of hives.In my dog this was caused by an insect sting. In people it can be cause by shellfish, nuts and plants, and antibiotics to name a few.or some people it is not their skin that is affected. In these people stress can trigger inflammation in their digestive track or respiratory tract (Houck, C. 1996). This can cause a slew of other stress related illnesses. It's important to remember that our skin frequently shows our emotions.