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.
You can have viral hives on your arm for a few minutes, only to see them move to your shoulder or even your stomach. Small areas of viral hives can turn into large areas inside of a few minutes. The only thing you can do to keep it from spreading is take a hives treatment that eliminates hives. What Causes Viral Hives? Viral hives are caused when your immune system senses an allergen in the body and releases histamine into your blood stream to fight it off. This is what causes the hives to appear on your skin, however, more specifically, viral hives are generally caused by a viral infection such as the flu, hepatitis, herpes, croup and many other viral infections. Your immune system is attempting to eradicate these viruses by releasing the histamine that causes your viral hives. What Are The Symptoms of Viral Hives? Viral hives symptoms include red bumps and swollen areas on the skin that seem to appear out of nowhere.