Patch Testing For Skin Allergies
Skin testing is a common diagnostic tool used to identify the specific allergens that trigger contact dermatitis and, occasionally, systemic allergic reactions. Common trigger substances include cleaning solutions, detergents, cosmetics, perfumes, latex rubber and poison ivy.
In this method of allergy testing, many patches are taped to the skin, usually the skin of the upper back. Unlike the two previous methods of allergy skin testing, patch tests necessitate that the patches be left in place for 48 hours during which the area must be kept dry. As with the other forms of allergy skin testing, patients must be alerted to the possibility of a severe reaction so they can remove any patch that is causing serious problems, such as wheezing, and notify their physician immediately.
Poison ivy is a common plant known to cause allergic reactions in a large percentage of people. These allergic reactions usually manifest as unsightly and uncomfortable rashes on the skin. Skin rashes from poison ivy, like those from poison oak and poison sumac, are precipitated by an oily substance called urushiol found in the leaves, stems and roots of the plant. Poison ivy is found growing all over the continental United States, so rashes from poison ivy are very common.
As with other allergens, individuals may build up an intolerance to urushiol over repeated exposures, believing themselves to be immune to the substance until they develop a severe reaction. Poison ivy only develops from direct contact with urushiol and is not contagious through contact with affected individuals or blister fluid.
While the poison ivy rash normally disappears on its own, when larger areas of the body are affected, recovery may take longer.
Recommended home treatments for the itchy rash may include:
- Taking baths in colloidal oatmeal
- Applying hydrocortisone cream to the affected areas
- Taking over-the-counter antihistamines
- Taking over-the-counter pain relievers
Schedule Your Appointment
If you would like to discuss treatment for Patch Testing in Brooklyn, call Kleydman Dermatology today to schedule a consultation with our board-certified dermatologist.
