Introduction
A 35-year-old patient once told me, "Doctor, I feel breathless only on weekdays. On Sundays and during holidays, I am perfectly fine." He worked in a spray-painting unit near Ambattur. His was a classic case of occupational asthma, which is asthma caused by something at work.
Chennai is one of India's biggest industrial and manufacturing hubs, with automobile plants, textile units, bakeries, hospitals, chemical factories and IT offices. That makes this topic important for thousands of working people in our city.
How Common Is It?
Very common, and often missed. According to the Merck Manual, about 15% of adult-onset asthma is linked to work exposure1. A systematic review concluded that at least 15% and possibly up to 20% of adult asthma is caused by occupational exposures2. The US National Institute for Occupational Safety and Health says over 300 workplace substances are known to cause new asthma3.
High-Risk Jobs and What Causes the Problem
| Job | Common Trigger |
|---|---|
| Bakers, flour mill workers | Flour dust, enzymes |
| Car painters, spray painters | Isocyanates in paints |
| Hairdressers, beauticians | Bleaching powders, hair dyes |
| Healthcare workers, nurses | Latex gloves, disinfectants |
| Cleaners, housekeeping staff | Bleach, strong cleaning chemicals |
| Textile and garment workers | Cotton dust, dyes |
| Woodworkers, carpenters | Wood dust |
| Welders, metal workers | Metal fumes |
| Seafood processing workers | Prawn and fish proteins |
| Farmers, poultry workers | Grain dust, animal proteins |
| Lab and pharmaceutical staff | Animals, drug powders |
| Office workers | Poor ventilation, dust, mould in AC ducts |
Warning Signs
- Cough, wheezing, chest tightness or breathlessness during or after work
- Symptoms that improve on weekends and holidays
- Running nose, sneezing or itchy eyes at work (this often comes before asthma)
- Symptoms that start a few hours after a shift, at night
- Colleagues with similar complaints
Why Early Diagnosis Matters
If the trigger is found early and exposure is stopped, many people improve a lot, and some recover fully. If exposure continues for years, the asthma can become permanent, even after leaving the job.
Studies show this condition is often overlooked. A UK general practice study found that while nearly a third of adult-onset asthma patients worked in high-risk jobs, a possible link to work had been noted in only 18% of them4.
How Do We Diagnose It?
1. Detailed work history: What do you do? What do you breathe at work? 2. Spirometry: A lung function test. 3. Peak flow diary: You blow into a small device several times a day, at work and at home, for 2–4 weeks. A pattern of lower readings on work days strongly suggests occupational asthma. 4. Sometimes allergy tests or specialised challenge tests.
Bring your company's safety data sheets (MSDS) for the chemicals you handle. It helps your doctor a lot.
Treatment
- • Reduce or stop exposure to the trigger. This is the most important step.
- Regular asthma medicines (inhalers) as prescribed.
- Proper respiratory protection, though masks alone are often not enough for sensitising chemicals.
- A changed role within the same company can sometimes help.
Tips for Employees
- Always use the protective equipment provided (masks, respirators, gloves).
- Ask for proper ventilation and exhaust systems.
- Change out of work clothes before going home, so dust does not travel to your family.
- Do not smoke, as it makes work-related lung damage worse.
- Report symptoms early to your company doctor.
Tips for Employers and HR Teams
- Replace harmful chemicals with safer alternatives where possible.
- Install good local exhaust ventilation.
- Provide well-fitted respirators and train staff to use them.
- Conduct regular health check-ups with spirometry for high-risk workers.
- For offices, clean AC ducts regularly and fix leaks and mould.
- Encourage a culture where workers can report breathing problems without fear.
A healthy workforce is a productive workforce. Fewer sick days and lower attrition benefit everyone.
Frequently Asked Questions
Q1.Can office workers get work-related asthma?
Yes. Poor ventilation, dust, mould in AC systems, strong cleaning chemicals and even renovation work can trigger symptoms.
Q2.Will I have to quit my job?
Not always. Many people can continue after the exposure is reduced or after moving to a different section. Your doctor and employer can work together on this.
Q3.Is occupational asthma permanent?
It can be if exposure continues for long. Early diagnosis gives the best chance of recovery.
KEY TAKEAWAY
The Bottom Line
If your breathing gets worse at work and better at home, take it seriously. Write down your symptoms, note the days, and see a lung specialist. Early action can protect both your health and your career.
Sources & references
- Merck Manual, about 15% of adult-onset asthma is linked to work exposure merckmanuals.com/professional/pulmonary-disorders/environmental-and-oc…
- At least 15% and possibly up to 20% of adult asthma is caused by occupational exposures link.springer.com/article/10.1186/1471-2466-9-7
- US National Institute for Occupational Safety and Health says over 300 workplace substances are known to cause new asthma cdc.gov/niosh/bulletin/2020/work-related-asthma.html
- A possible link to work had been noted in only 18% of them academic.oup.com/occmed/article/49/4/217/1387102
ABOUT THE AUTHOR
Dr. Koushik Muthu Raja Mathivanan, M.D.
Dr. Koushik Muthu Raja Mathivanan is a Consultant Pulmonologist in Chennai, offering lung function testing and workplace respiratory health assessments.
This article is for general awareness and does not replace a consultation with your doctor.
Have a concern about your breathing?
Online articles can support awareness, but they cannot replace an individual medical assessment.