Which type of metalworking fluid is most often responsible for oil folliculitis?

Oil folliculitis is a skin condition characterized by inflammation of the hair follicles, often linked to exposure to certain types of metalworking fluids. Natural oils, which are derived from plant sources, can lead to such an issue because they may contain fatty acids and other components that can irritate the skin, especially when used repeatedly in metalworking processes.

Natural oils have a tendency to be more allergenic or irritative compared to synthetic and mineral oils, as they can be less refined and contain impurities or reactive substances. This exposure can lead to skin conditions like oil folliculitis, particularly when workers are in regular contact with these fluids without adequate protective measures.

Mineral oils, synthetic fluids, and emulsified oils, while also used in machining and manufacturing, typically have formulations designed to reduce skin irritation and improve lubricating properties, which lessen the likelihood of causing such skin issues.