{"id":3175,"date":"2026-10-04T20:59:16","date_gmt":"2026-10-05T00:59:16","guid":{"rendered":"https:\/\/borealisderm.com\/uncategorized\/contact-dermatitis-poison-ivy\/"},"modified":"2026-10-14T09:13:44","modified_gmt":"2026-10-14T13:13:44","slug":"contact-dermatitis-poison-ivy","status":"publish","type":"post","link":"https:\/\/borealisderm.com\/hi\/medical-dermatology\/contact-dermatitis-poison-ivy\/","title":{"rendered":"Contact Dermatitis & Poison Ivy"},"content":{"rendered":"

\u2190 Back to Medical Dermatology<\/a><\/p>\n

Contact dermatitis is an itchy, inflamed rash caused by something that touches the skin. Sometimes the trigger directly irritates the skin; other times the immune system has developed an allergy to a substance that was previously tolerated.<\/p>\n

Common triggers include soaps, cleaning products, fragrances, preservatives, metals, adhesives, gloves, hair products, cosmetics, topical medications, plants such as poison ivy, and workplace exposures.<\/p>\n

Irritant vs. allergic contact dermatitis<\/h2>\n

Irritant contact dermatitis<\/strong> occurs when repeated or strong exposure damages the skin barrier. Frequent handwashing, sanitizers, detergents and wet work are common examples.<\/p>\n

Allergic contact dermatitis<\/strong> is a delayed immune reaction to a specific allergen. Nickel, fragrance, preservatives, hair dye ingredients, adhesives and topical medications are frequent causes.<\/p>\n

Poison ivy, poison oak and poison sumac<\/h2>\n

These plants contain urushiol, an oil that can cause allergic contact dermatitis. The rash may be intensely itchy and blistering. The fluid inside the blisters does not spread the rash, but urushiol remaining on clothing, tools, pets or other surfaces can cause new exposure.<\/p>\n

How we evaluate contact dermatitis<\/h2>\n

The location and shape of the rash often provide important clues. We review skin-care products, medications, hobbies, work exposures and anything new that may have contacted the skin. When allergic contact dermatitis remains a concern, patch testing may be recommended<\/strong> to help identify a delayed skin allergy.<\/p>\n

Contact dermatitis can resemble eczema<\/a>, fungal infection, psoriasis or other rashes<\/a>, so persistent or recurrent cases deserve a diagnosis rather than repeated trial-and-error treatment.<\/p>\n

Treatment<\/h2>\n