Occupational skin disease produces 480 claims a year. The research behind the guidance says most cases never become claims.

Three diseases, one surface

Contact dermatitis is inflammation of the skin caused by something that has touched it, and Safe Work Australia's topic guidance describes what that means in working terms: skin that is dry, red, painful and itchy, that can split and crack, peel, sting, burn and blister, mostly on the hands but spreading to arms and face, and taking "many months" to heal. The guidance separates three types. Irritant contact dermatitis is the most common: the skin's natural barrier worn down by repeated exposure to an irritant, or simply by repeated wetting and drying. Allergic contact dermatitis is the one with the long fuse: it can develop after many years of exposure, then be triggered by trace amounts, appear up to 72 hours after contact, and once developed "is likely to be a lifelong allergy". Contact urticaria is the rarest and fastest, a 10-to-30-minute allergic response that can bring hives, hay-fever-like symptoms, asthma and sometimes anaphylaxis, with certain animal and plant products, including latex gloves, among the causes. The occupations the guidance names as most affected are food handlers, cleaners, construction workers, and workers in healthcare and manufacturing; the sector picture for healthcare sits with the aged care page.

The dermal route in the chemicals framework

Skin is one of the three routes the chemicals framework is built around. The model Code of Practice: Managing risks of hazardous chemicals in the workplace, June 2023 edition, lists routes of entry as inhalation, skin contact and ingestion, and the labelling system a duty holder already operates carries the warnings: a label or safety data sheet that says "may cause an allergic skin reaction" or "causes skin irritation" is the classification system doing exactly what it is for. The register, label and SDS duties that attach to any quantity of a hazardous chemical are covered on the chemical storage page. The precision point this page adds: the workplace exposure standards that carry legal force under regulation 49 are standards for airborne concentration. No equivalent numeric limit exists for absorption through skin. What the framework provides instead is a flag: "Some chemicals with exposure standards can also be absorbed through the skin", the code says, and "these are given a notation of 'Sk' in the publication Workplace Exposure Standards for Airborne Contaminants". For those chemicals the code points to biological monitoring as the way to assess what the lungs-only number misses. An air reading below the standard proves nothing about what a bare forearm took in.

Wet work has numbers

The most common cause of occupational contact dermatitis is not an exotic chemical but water, and the guidance is unusually numeric about when wet becomes a hazard. Wet work, on Safe Work Australia's definitions, is any part of the body in water or other liquids for longer than 2 hours a shift, any part of the body inside waterproof personal protective equipment such as gloves for longer than 2 hours a shift, handling wet things for longer than 2 hours a shift, or washing your hands more than 20 times a shift. Dermatitis caused by wet work "is particularly common in cleaners, healthcare workers, food handlers and hairdressers", and the guidance adds the environmental multipliers: high dust or airborne fibres, friction from rough surfaces and tools, dry air, very hot or very cold conditions, and frequent handwashing or sanitiser use. Note what the second limb of the definition does: it makes two hours inside waterproof gloves wet work in itself, an entry that becomes important one section down.

The hierarchy applied to skin: the glove comes last

Safe Work Australia's managing-risks guidance orders skin controls by the same hierarchy that governs every hazard on this masthead, and its examples are concrete. Elimination first: use a dishwasher rather than washing and drying by hand, removing the wet work entirely. Substitution next: a water-based paint or sealer instead of a solvent-based one, nitrile gloves rather than latex where latex allergy is the risk. Then the minimising controls: tongs or baskets to pick up wet items, sharing wet work between workers so no one person carries the exposure, air conditioning where people work in waterproof clothing to reduce sweating, soaps designed for skin rather than solvents to clean hands, training in skin care, and a skin check program so workers recognise the early warning signs. Personal protective equipment sits at the bottom of the list, as it does in the law's control order, and here it carries a hazard of its own. The guidance says it plainly: "gloves can stop a substance getting on a worker's hands but introduce their own contact dermatitis risks due to sweating or allergy to latex", and by the wet-work definition above, two hours inside waterproof gloves is itself the exposure. Cotton liners inside protective gloves absorb the sweat; a business that answers a dermatitis problem by simply issuing thicker gloves may be feeding it.

Where skin monitoring becomes regulation

For a defined list of chemicals, watching the skin is not good practice but a legal duty. Regulation 368 of the model WHS Regulations requires a PCBU to ensure health monitoring is provided to a worker carrying out ongoing work with hazardous chemicals where there is a significant risk to health because of exposure to a chemical listed in Schedule 14, table 14.1. The schedule then prescribes what the monitoring involves, and skin is written through it: inorganic arsenic requires physical examination "with emphasis on the peripheral nervous system and skin"; inorganic chromium requires "weekly skin inspection of hands and forearms by a competent person"; creosote monitoring covers recognition of photosensitivity and skin changes, noting abnormal lesions and evidence of skin sensitisation; isocyanates, which the chemicals code names as sensitisers, require examination of the respiratory system and skin. For everything outside the schedule, regulation 368 still applies where there is significant risk and valid techniques exist to detect the effect. A weekly skin inspection mandated by regulation is a useful benchmark for how seriously the framework treats the dermal route at its sharpest end.

A disease the claims data cannot count

On the national claims table, occupational skin disease barely exists: 480 serious claims for skin and subcutaneous tissue diseases in 2023-24, 0.3 per cent of the total, with median 4.5 weeks lost and $9,300 compensation; the "chemicals and other substances" mechanism row is similarly small at 1,200 claims. The research says the smallness is an artefact. Safe Work Australia's report Occupational contact dermatitis in Australia, April 2006 and still listed on the agency's contact dermatitis resources page, calls the condition "one of the most commonly reported and underestimated occupational diseases" internationally, with overseas incidence estimates of 50 to 190 cases per 100,000 full-time workers a year, and finds evidence that Australian workers' compensation datasets "particularly underestimate its occurrence". Its evidence is specific: in GP encounter data, skin conditions were the second most common work-related problem presented (13 per cent), yet workers' compensation was obtained in only 19.7 per cent of dermatitis cases, against 290 accepted contact dermatitis claims nationally in 2002-03. The reasons it lists, low awareness that the disease is compensable, only serious cases claimed, and difficulty proving the work connection, are the same mechanics that hide noise-induced hearing loss in the same table, examined on the noise page. A duty holder reading their own claims history as evidence of no skin problem is reading the wrong instrument.