Seasonal Allergies,
Ventilation and Indoor Air Quality

Mid-spring is a welcome shift – longer days, warmer weather, and a boost in morale. But it also brings a less celebrated guest: seasonal allergies. Bank holidays in the garden, grass cutting, or weekend walks in the countryside, all welcome activities but for many employees, and those self-employed and working outdoors. Rising pollen levels can mean fatigue, headaches, and reduced concentration, all of which quietly impact wellbeing and productivity.

From an employer’s perspective, this is more than a comfort issue – it’s a workplace health and safety consideration. Under UK health and safety law, there’s a clear duty to provide a working environment with adequate ventilation and good indoor air quality. During high pollen periods, this becomes especially relevant. Simply opening windows may not always help; in fact, it can sometimes make things worse. Regular maintenance of Heating, Ventilation, and Air Conditioning (HVAC) systems, use of appropriate filtration, and monitoring indoor air quality can make a noticeable difference.

There’s also an Employers’ Liability angle to consider. If poor indoor air exacerbates health conditions, employers could be exposed to risk. Taking proactive steps not only supports compliance but demonstrates a genuine commitment to employee wellbeing.

Then there’s absence management. Allergy-related sickness may not always result in full days off but can lead to presenteeism – employees showing up but operating below their best. Encouraging open conversations, offering flexible working where possible, and making small adjustments (like air purifiers or desk relocation) can help mitigate this.

Many employees turn to over-the-counter relief like antihistamines. While these can be effective at managing symptoms, they may introduce a different kind of workplace risk – particularly for those in safety-critical roles.

Some antihistamines, especially older or “sedating” types, can cause drowsiness, slower reaction times, blurred vision, and reduced alertness. For employees working outdoors, operating machinery, driving, or working at height, this can significantly increase the likelihood of accidents.

From a health and safety perspective, employers should treat this in the same way as any other impairment risk. Under UK duties to protect employee safety, it’s important to consider not just the condition – but also the side effects of treatment.

Start by raising awareness. Many employees may not realise that common allergy medications can affect performance. Encourage them to check labels for warnings such as “may cause drowsiness” and to seek non-drowsy alternatives where appropriate.

For higher-risk roles, a simple but effective step is to include medication use in fitness-for-work conversations or daily briefings – without being intrusive. This helps create a culture where employees feel comfortable flagging potential issues.

Where there’s a risk, consider temporary adjustments. This could include reallocating tasks, avoiding lone working, or increasing supervision during peak pollen periods.

It’s not about restricting people – it’s about managing risk sensibly. With the right awareness and controls in place, employees can manage their allergies safely without compromising their wellbeing or the safety of others.

Mid-spring doesn’t have to mean a dip in productivity. With a few thoughtful measures, employers can create a healthier, more comfortable workplace – where everyone can breathe a little easier.