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.
Frequent boils may be caused due to this bacteria in their skin and nasal passages. Medical conditions like diabetes too can cause boils on the neck. Clothing can also cause the skin to get irritated, causing boils. Symptoms may include, swollen red skin on the neck area. The boil may be a hard and reddish bump in the initial stages.