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.
With seborrhoeic eczema, your scalp becomes irritated, red, and scaly. Thick scabs can become itchy and very uncomfortable. The inflammation of seborrhoeic eczema can cause it to spread to your face, neck, and behind the ears. In severe cases, it can also spread to the rest of your body. The cause isnât known.