Indusium: the case made by an insect larva: a membranous layer of the embryo of Locustidae below the serosa. Explanation of Terms Used in Entomology John. B. Smith. serosa: the outer membrane that envelops the forming embryo, the amnion and the remainder of the egg. Explanation of Terms Used in Entomology John.
In essence, your body forms an allergic reaction to stress. Unfortunately, stress can not be eliminated with histamine, so instead, the histamine just causes hives to appear on your face, neck, chest and other parts of your body.
Stress hives symptoms include red bumps and swollen areas on your skin that seem to appear almost out of nowhere. They are typically quite itchy and have been known to cause a prickly or burning sensation - especially if touched. Stress hives can appear on any part of your body (face, hands, feet, arms, etc.) and can vary in size from as small as the eraser on a pencil to as large as a dinner plate.