Occupational skin diseases among cathode material workers in the Korean lithium-ion battery industry: a descriptive case series

BackgroundOccupational skin diseases are common in industrial settings; however, few studies have examined workers involved in the production of lithium-ion battery cathode-active materials. This study aimed to investigate the patterns and factors associated with skin diseases in these workers. MethodsOverall, 37 workers with a history of skin disease were recruited from two cathode-active material manufacturing companies. Onsite investigations, semi-structured interviews, and workplace observations were conducted. Information on skin symptoms, affected areas, symptom frequency, and aggravating factors was collected. ResultsThe most commonly reported symptoms were pruritus (27.5%), erythema (20.3%), and chemical burns (15.9%). The most commonly affected areas were the hands and forearms (47.2%), whereas 18.9% of workers reported symptoms in unexposed areas, such as the thighs. The symptoms tended to worsen on workdays and improved during holidays. Less-experienced workers reported more frequent symptoms. ConclusionsSkin diseases during cathode material production appear to be primarily caused by irritants and allergic contact dermatitis, as well as chemical burns caused by exposure to metal dust, such as lithium, nickel, and cobalt. An urgent need exists for appropriate personal protective equipment, improved work environments, and targeted education for new workers.