Contact dermatitis is an allergic or irritant reaction that causes a painful or itchy skin rash. As the name suggests, you get contact dermatitis from coming into contact with an allergen (like poison ivy) or an irritant (like a chemical).
Is contact dermatitis the same as allergic dermatitis?
Atopic dermatitis and contact dermatitis are two common types of eczema that are often confused. While they are both inflammatory skin conditions that share similar symptoms, their causes are different. Atopic dermatitis is an internal skin condition, whereas contact dermatitis results from external factors.
Is allergic contact dermatitis a delayed allergy?
Allergic contact dermatitis is a delayed hypersensitivity reaction in which a foreign substance comes into contact with the skin; skin changes occur after reexposure to the substance.
What is an allergic skin condition?
A skin allergy is when skin becomes irritated because the immune system reacted to something that is usually harmless. This is called an allergic reaction. An allergic reaction can cause rash, itching, burning, redness, bumps, hives, and swelling. Many different allergens can cause a reaction.
What type of skin condition is dermatitis?
Dermatitis is a general term that describes a common skin irritation. It has many causes and forms and usually involves itchy, dry skin or a rash. Or it might cause the skin to blister, ooze, crust or flake off.
What is the most common cause of allergic contact dermatitis?
Nickel. Nickel is the most frequent cause of allergic contact dermatitis.
How long can allergic contact dermatitis last?
Contact dermatitis usually occurs on areas of your body that have been directly exposed to the reaction-causing substance — for example, along a calf that brushed against poison ivy or under a watchband. The rash usually develops within minutes to hours of exposure and can last two to four weeks.
Which antihistamine is best for contact dermatitis?
A nonprescription oral corticosteroid or antihistamine, such as diphenhydramine (Benadryl), may be helpful if your itching is severe. Apply cool, wet compresses. Moisten soft washcloths and hold them against the rash to soothe your skin for 15 to 30 minutes. Repeat several times a day.
Can allergic dermatitis spread?
Allergic contact dermatitis frequently appears to spread over time. In fact, this represents delayed reactions to the allergens. Several factors may produce the false impression that the dermatitis is spreading or is contagious. Heavily contaminated areas may break out first, followed by areas of lesser exposure.
How do you test for allergic contact dermatitis?
The best way to test for a reaction to allergens is by patch testing. During a patch test, tiny amounts of known allergens are applied to your skin. The substances are attached to your back using a kind of non-allergic tape. They may sometimes be attached to the upper arms.
What are the 4 types of allergic reactions?
Four different types of allergic reactions are immediate, cytotoxic, immune-complex mediated and delayed hypersensitivity reactions. Allergic reactions occur when the body’s immune system has a reaction to a substance it sees as harmful, called an allergen.
What allergens are skin allergy?
Allergic skin conditions can occur after exposure to different allergens, including:
- Latex, pet dander or poison ivy.
- Cold or hot temperatures.
What is the difference between eczema and dermatitis?
Dermatitis means inflammation of the skin. Eczema is a term used to describe a group of skin conditions in which the skin is itchy, dry, and inflamed. The terms eczema and dermatitis are often used interchangeably. But “dermatitis” is a broader term that encompasses more than eczema rashes.
How do you get rid of contact dermatitis fast?
Contact Dermatitis Treatment and Home Remedies
Remove or avoid the allergen or irritant that caused the rash. Apply hydrocortisone cream over small areas. For blisters, use a cold moist compress for 30 minutes, three times a day. Put moisturizers on damaged skin several times a day to help restore the protective layer.
Does contact dermatitis go away by itself?
Most cases of contact dermatitis go away on their own once the substance is no longer in contact with the skin. Here are some tips you can try at home: Avoid scratching your irritated skin. Scratching can make the irritation worse or even cause a skin infection that requires antibiotics.