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.
Angioedema is like hives, but with hives there are itchy red welts on the surface of your skin. Angioedema is a deeper swelling. Both hives and angioedema are usually caused by an allergic reaction to either a food or medication. Things like pollen or insect stings can also cause angioedema.In rare cases, it may be a sign of an underlying condition, such as leukemia or Hodgkin's disease. There are two basic types of angioedema:ngioedema is like hives, but with hives there are itchy red welts on the surface of your skin. Angioedema is a deeper swelling. Both hives and angioedema are usually caused by an allergic reaction to either a food or medication. Things like pollen or insect stings can also cause angioedema.