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Urushiol-induced contact dermatitis (also called Toxicodendron dermatitis or Rhus dermatitis) is a type of allergic contact dermatitis caused by the oil urushiol found in various plants, most notably sumac family species of the genus Toxicodendron: poison ivy, poison oak, poison sumac, and the Chinese lacquer tree. [1]
Food allergies rarely cause respiratory (asthmatic) reactions, or rhinitis. [24] Insect stings, food, antibiotics , and certain medicines may produce a systemic allergic response that is also called anaphylaxis; multiple organ systems can be affected, including the digestive system , the respiratory system , and the circulatory system .
Hypoallergenic, meaning "below average" or "slightly" allergenic, is a term meaning that something (usually cosmetics, pets, textiles, food, etc.) causes fewer allergic reactions. The term was first used in 1953 in an advertising campaign for cosmetics [ 1 ] [ better source needed ] or perhaps as early as 1940. [ 2 ]
An allergen is an otherwise harmless substance that triggers an allergic reaction in sensitive individuals by stimulating an immune response.. In technical terms, an allergen is an antigen that is capable of stimulating a type-I hypersensitivity reaction in atopic individuals through immunoglobulin E (IgE) responses. [1]
[1] [5] [2] [6] The common allergies vary depending on the country. [1] Risk factors include a family history of allergies, vitamin D deficiency, obesity, and high levels of cleanliness. [1] [2] Allergies occur when immunoglobulin E (IgE), part of the body's immune system, binds to food molecules. [1] A protein in the food is usually the ...
For example, in 1996 the International Programme on Chemical Safety proposed calling it idiopathic environmental illness, because of their belief that chemical exposure may not the sole cause, [7] while another researcher, whose definition includes people with allergies and acute poisoning, calls it chemical sensitivity. [9]
Most cases of metal allergy are caused by consumer products containing metal; exposure at work can also cause metal allergies. [3] The largest human exposure to metals is ingestion; while food or drink containing metals can cause an allergic reaction in people who already have an allergy, it's not clear if it can cause a new allergy, as of 2021 ...
Less common causes include: physical factors, biological agents such as semen, latex, hormonal changes, food additives and colors, and topical medications. [18] Physical factors such as exercise (known as exercise-induced anaphylaxis ) or temperature (either hot or cold) may also act as triggers through their direct effects on mast cells .