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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]
Individuals with OAS may have any of a number of allergic reactions that usually occur very rapidly, within minutes of eating a trigger food. The most common reaction is an itching or burning sensation in the lips, mouth, ear canal, or pharynx. Sometimes other reactions can be triggered in the eyes, nose, and skin.
Urushiol is an oleoresin contained within the sap of poison ivy and related plants, and after injury to the plant, or late in the fall, the sap leaks to the surface of the plant, where under certain temperature and humidity conditions the urushiol becomes a blackish lacquer after being in contact with oxygen. [15] [16] [11] Urushi lacquer is ...
An antihistamine may help relieve itching. (NOTE: Drowsiness may occur.) In severe cases or if the rash is on the face or genitals, seek professional medical attention.
You may need a fluoroscopic swallowing study, which involves eating or drinking while being filmed under x-ray to see how food moves in the mouth and throat, Dr. Nocerino says.
Histamine, the structure shown, causes a person to feel itchy during an allergic reaction. Conditions caused by food allergies are classified into three groups according to the mechanism of the allergic response: [56] IgE-mediated (classic) – the most common type, occurs shortly after eating and may involve anaphylaxis.
May slow clotting; contraindicated for people with bleeding disorders and before and after surgery. May induce uterine contractions; contraindicated when pregnant or nursing. [21] Pyrrolizidine alkaloids (contained in comfrey, borage, senecio, coltsfoot, and others) Liver damage [5] Reserpine: Rauvolfia serpentina
The mouth may act as a reservoir of Candida that reinfects the sores at the corners of the mouth and prevents the sores from healing. [citation needed] A lesion caused by recurrence of a latent herpes simplex infection can occur in the corner of the mouth. This is herpes labialis (a cold sore), and is sometimes termed "angular herpes simplex". [2]