Nickel release from tools on the Swedish market.

Nickel allergy in women has been thoroughly studied: its prevalence, the most important sources of sensitization, and risk factors for elicitation of dermatitis. Preventive measures have also been introduced. Nickel allergy in men has not, however, been equally focused on. Based on clinical experience, some publications indicating that tools may be a risk factor for nickel allergy and hand eczema in men, and the fact that large occupational groups regularly use tools, we decided to carry out a study, of the prevalence on the market of tools that release nickel. 27% of 565 hand-held tools with metal parts that come into contact with the skin were found to be dimethylglyoxime (DMG) test positive. Release of nickel and other metals into artificial sweat and composition of metals on the surface and in the base alloy were also studied. It is suggested that tool producers should consider nickel allergy and avoid nickel-releasing materials, and that analytical methods, relevant for nickel release from tools, should be further developed.