So, it's an intensely uncomfortable, itchy, red rash. So it's a potentially debilitating chronic illness. All exposed and exterior skin surfaces. And many patients will have them on the mucous membrane surfaces, such as in the upper airway or in the urethra. So, it can be a very widespread, generalized type of rash or eruption and, again, very devastating.
Hives do appear at any time of life.
If you want to really segment out which part of the population is more prone to individual kinds of hives, children and young adults tend to get transient, time-limited, acute hive exacerbations that typically last for just a few days to a few weeks. Whereas middle-aged women are the group we see more often with chronic hives. If you want to separate out in terms of the triggers for hives, in children we see that acute respiratory or other viral infections are the most common cause of hives, and far outnumber cases of even food-triggered allergic hives in childhood.