Irritant contact dermatitis is not a primary reaction of your immune function to a foreign invader. In dandruff/seb derm patients they usually assume it is their dandruff or seb derm spreading.” In many of these patients, they don’t even get a rash on their scalp. “The most common thing I diagnose in my eczema center is eyelid, neck or facial dermatitis being caused by allergy to an ingredient in shampoo. Zirwas explains, “the most common areas affected off of the scalp when people have allergy are the eyelids, in front of the ears, the jawline, and the neck.” For example, your skin may tingle or sting after the use of a shampoo, but only exactly where the shampoo has been used.Īllergic contact dermatitis, on the other hand, can cause the body to react over a greater area than that which was exposed to the allergen. Irritant contact dermatitis – the most common kind – usually impacts only the area it’s applied to. The major difference between both conditions is the area of effect. When an ingredient irritates your skin you can easily mistake irritant contact dermatitis for allergic contact dermatitis. The important question is – how do you tell if you’re allergic to your shampoo or if it’s a less life-changing irritancy reaction? What’s the difference between irritant vs allergic contact dermatitis
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