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Contact dermatitis is an itchy rash caused by direct contact with a substance or an allergic reaction to it. The rash isn't contagious, but it can be very uncomfortable. Many substances can cause this reaction, such as cosmetics, fragrances, jewelry and plants.
Contact with certain substances, such as poison ivy, skin lotions and detergents, can cause an itchy rash. Here's how to manage this common form of dermatitis.
Allergic contact dermatitis results when the skin touches substances that it's sensitive to. These substances are called allergens. The rash usually affects only the area that came into contact with an allergen.
Contact dermatitis can appear as an itchy rash. Each type of dermatitis tends to occur on a different part of the body. Symptoms may include: Itchiness that can be painful. Dry, cracked, scaly skin, more typical on white skin. Rash on swollen skin that varies in color depending on skin color.
Allergic contact dermatitis is an itchy rash caused by touching substances you're allergic to. The color of the rash varies depending on your skin color. Sleep problems. The itchiness of atopic dermatitis can interfere with sleep. Mental health conditions. Atopic dermatitis is associated with depression and anxiety.
Nickel allergy is a common cause of allergic contact dermatitis — an itchy rash that appears where your skin touches a usually harmless substance. Nickel allergy is often associated with earrings and other jewelry.
To diagnose dermatitis, your doctor will likely look at your skin and talk with you about your symptoms and medical history. You may need to have a small piece of skin removed for study in a lab, which helps rule out other conditions.
Contact dermatitis can appear as an itchy rash. Poison ivy rash is caused by an allergic reaction to an oily resin called urushiol (u-ROO-she-ol). This oil is in the leaves, stems and roots of poison ivy, poison oak and poison sumac.
Sun allergy is a broad term. It describes several conditions that cause an itchy rash to form on the skin after being in sunlight or other sources of ultraviolet (UV) radiation. Polymorphous light eruption is the most common form of sun allergy. Some people have a hereditary type of sun allergy.
Allergic contact dermatitis. This reaction results from the chemical additives used during manufacturing. The main symptom is a skin rash with formation of blisters 24 to 48 hours after exposure, similar to poison ivy.