Let's take a closer look at the setting. What is Setting? You probably remember from grade school that the setting is where the story takes place, like the woods or Grandmother's house. Actually, the setting of a story tells the time, place, and duration of a story and is told using techniques like imagery. Time
Hives frequently occur following an infection or as a result of an allergic reaction such as to medication, insect bites, or food. Psychological stress, cold temperature, or vibration may also be a trigger. In half of cases the cause remains unknown. Risk factors include having conditions such as hay fever or asthma.
Hives are most commonly caused by  an allergic reaction in which your immune system releases histamine into the bloodstream to fight the allergen. In essence, your immune system thinks there is a foreign substance (called allergens) in your system, and tells the body to release histamine to fight it off.