Hives vary in size (from a pencil eraser to a dinner plate), and may join together to form larger areas known as plaques. If an inciting cause can be determined, then specific hives ought to be effective, or in the case of food or drug allergy, strict avoidance would be necessary. It is important to remember that there are many more things in addition to food allergies that can cause hives in kids.
Antihistamines are divided into older, first-generation drugs and newer, second-generation medications based on their chemistry and associated side effects. Urticaria, commonly referred to as hives, is the most frequent dermatologic disorder seen in the ED. It is estimated that 20% of all people will develop urticaria at some point in their lives.