A<unk>  bulb next to a clove crushed in a<unk>  press<unk>  or<unk> c contact dermatitis to<unk>  is a common inflammatory skin condition caused by contact with<unk>  oil or dust. It mostly affects people who cut and handle fresh<unk> , such as chefs, and presents on the tips of the thumb, index and middle fingers of the non-dominant hand (which typically hold<unk>  bulbs during the cutting). The affected fingertips show an asymmetrical pattern of fissure as well as thickening and shedding of the outer skin layers, which may progress to second- or third-degree burn of injured skin.<unk>  dermatitis is similar to the tulip dermatitis and is induced by a combined mechanical and chemical action. Whereas the former mechanism acts via skin rubbing which progresses into damage, the major cause of the latter is the chemical diallyl disulfide (DADS), together with related compounds allyl propyl disulfide and allicin. These chemicals occur in oils of plants of the genus Allium, including<unk> , onion and leek.<unk>  has been known since at least 1950. It is not limited to hand contact, but can also be induced, with different symptoms, by inhaling<unk>  dust or ingesting raw<unk> , though the latter cases are relatively rare. DADS penetrates through most types of commercial gloves, and thus wearing gloves while handling<unk>  has proven inefficient against the<unk> . Treatment includes avoiding any contact with<unk>  oil or vapours, as well as medication, such as administering acitretin (25 mg/day, orally) or applying psoralen and ultraviolet light to the affected skin area over a period of 12 weeks (PUVA therapy).
Garlic allergy
Insect sting allergy
Tree nut allergy
Dust mite allergy
Wheat allergy
Shellfish allergy
Rice allergy
Sesame allergy