Common plants that produce allergic contact dermatitis includepoison ivy,poison oak, andpoison sumac. The allergenic chemical is present in the oil or latex that covers stems or leaves. Many other substances can cause allergic reactions, including components of hair dyes or straighteners; metallic ni...
Systemic contact dermatitis is an uncommon type of dermatitis that occurs after ingesting, inhaling, or injecting an offending substance. The rash often covers large areas of the body and can cause swelling. Systemic contact dermatitis can develop after a bout of allergic contact dermatitis. Systemic...
“There are two main types — allergic orirritant(dermatitis),” said Dr. Allison Arthur, a dermatologist and dermopathologist at Sand Lake Dermatology Center in Orlando, Florida, and a member of the American Academy of Dermatology. Allergic contact dermatitis develops when something touches your sk...
On your hands, you can have two types of dermatitis. Irritant contact dermatitis usually happens in the dry winter months or when you wash your hands too much. This can lead to cracking due to lack of moisture. You can also get allergic contact dermatitis from contact with irritants such a...
In allergic persons contact with pollen releases histamine from the tissues, which irritates the small blood vessels and mucus-secreting glands; symptoms may be aggravated by emotional factors. Antihistamine drugs and inhaled corticosteroids provide symptomatic relief. The most effective long-term treatment...
In this way, a normally protective process creates a cascade of what we know as allergy symptoms in response to harmless allergens. [4] There are other types of allergic reactions, such as delayed hypersensitivity reactions, which includes contact dermatitis from poison ivy or a nickel allergy —...
Contact dermatitis:Red, Read Moreexpand_more Related Health Conditions Allergic ConjunctivitisAllergic RhinitisAnaphylaxis Causes and triggers Many things in the environment can cause allergies. These harmless triggers are called “allergens.” Allergens will be different for different people, depending on ...
Read about allergy treatment, symptoms, testing, shots, and medicine. Learn about the types of allergies (asthma, allergic rhinitis, seasonal, conjunctivitis, eczema, anaphylaxis, hives) causes, risk factors, and more.
Eczema:Also known as atopic dermatitis, it is a skin condition. Most types ofeczemaare notallergies. But the disease can flare up when you're around things that cause anallergicreaction. Your body's immune system overreacts to substances, calledallergens, that are usually not harmful. You mig...
They are limited to areas of the skin that have been in direct contact with the irritant. For example, a janitor may develop symptoms on his hands after washing the floor with a strong detergent. Allergic contact dermatitis. This usually causes skin redness, blistering and severe itching. ...