Allergic Skin: Histamine, Skin Allergies and Treatment
Skin allergies, be it itchy and dry skin or more severe allergic conditions like psoriasis, eczema, or dermatitis share a common culprit; histamine. Elevated levels of histamine in the blood and tissues have been noted during allergic responses of the skin, nose, and airways. In fact, histamine is a known mediator of the cardinal signs of allergic reactions including edema, inflammation, and itchiness. 
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