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Contact dermatitis is a type of acute or chronic inflammation of the skin caused by exposure to chemical or physical agents. [1] Symptoms of contact dermatitis can include itchy or dry skin, a red rash, bumps, blisters, or swelling. These rashes are not contagious or life-threatening, but can be very uncomfortable.
Allergic contact dermatitis (ACD) is a form of contact dermatitis that is the manifestation of an allergic response caused by contact with a substance; the other type being irritant contact dermatitis (ICD). Although less common than ICD, ACD is accepted to be the most prevalent form of immunotoxicity found in humans. [1]
Low humidity from air conditioning was found to be the most common cause of physical irritant contact dermatitis. [3] To the lay person a definition of low humidity being a physical irritant can be confusing because low humidity is a deficit (or absence) of an elemental substance, whereas all other irritants implicated in contact dermatitis are in concentrations of relative abundance.
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]
Protein contact dermatitis is a cutaneous condition, and was a term originally used to describe an eczematous reaction to protein-containing material in food handlers. [1] Usually affecting the hands or forearms, it manifests clinically as a subacute or chronic dermatitis that recurs frequently over time. [ 2 ]
Allergic/contact dermatitis or atopic dermatitis As above. Eosinophils may be present in the dermis and epidermis (eosinophilic spongiosis). [2] Allergic dermatitis Atopic dermatitis Seborrheic dermatitis Typical findings: [5] Focal, usually mild, spongiosis with overlying scale crust, with a few neutrophils; The crust is often centered on a ...
Stasis dermatitis, allergic contact dermatitis, acute irritant contact eczema and infective dermatitis have been documented as possible triggers, but the exact cause and mechanism is not fully understood. [7] Several other types of id reactions exist including erythema nodosum, erythema multiforme, Sweet's syndrome and urticaria. [3]
Contact dermatitis is typically treated by avoiding the allergen or irritant. [9] [10] Antihistamines may help with sleep and decrease nighttime scratching. [2] Dermatitis was estimated to affect 245 million people globally in 2015, [6] or 3.34% of the world population. Atopic dermatitis is the most common type and generally starts in childhood.