Exposure to solvents and oils results in the mechanical blockage of the pilosebaceous units and leads to "oil acne." "Coal-tar acne" is produced by exposure to coal tar and shares the same causes and presentations as oil acne. Exposure to halogenated hydrocarbons can cause a diffuse, papular acne-form rash called chloracne (34-36).
In oil acne and coal-tar acne, comedos, pustules, and papules are typically present over inflamed and erythemic skin. Typical areas of exposure and disease are the hands and arms. Occupational acne may aggravate existing acne, usually on the face and neck, or be confused with adolescent acne. Secondary infection from bacterial folliculitis is common. Frequent cleaning and avoidance of the offending substance is critical. Infections respond to antibiotics (34-36).
Chloracne is also seen in people exposed to dioxins, a by-product in the manufacture of herbicides. Removal from exposure typically resolves the condition (34-37).
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