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.
The causes can be similar to those of acute urticaria but can also include your immune system, chronic infections, hormonal disorders, and tumors. Physical urticaria are hives caused by direct physical stimulation of the skin -- for example, cold, heat, sunlight, vibration, pressure, sweating, and exercise. They usually happen right where the skin was affected and rarely appear anywhere else. Most appear within 1 hour after exposure.