Psychology says employees may call in sick not because they're too ill to work, but to avoid micromanaging boss or unsupportive colleagues

Ever woken up with a mild cold and spent more time thinking about your boss than your symptoms? If the thought of walking into another tense meeting or facing difficult coworkers makes staying home feel like the better option, you're not alone.

Psychology suggests that the decision to take a sick day isn't always driven solely by how sick someone feels. Sometimes, what awaits at work can tip the balance. A Swedish study found that when employees are already ill, conflicts with supervisors, strained relationships with colleagues, and the prospect of an unusually stressful workday can influence whether they decide to report sick.

The findings come from a study by Hanna Hultin and colleagues, titled "Work-related psychosocial events as triggers of sick leave – results from a Swedish case-crossover study." The research was published 2011 in the peer-reviewed journal BMC Public Health.

Workplace stress often became the tipping point after illness

The researchers followed 546 sick-leave spells among Swedish employees to understand whether recent workplace experiences influenced the decision to stay home after becoming ill. Importantly, the study did not find that toxic workplaces caused illness. Instead, it examined whether work-related psychosocial events could trigger the decision to report sick when employees were already experiencing an illness.

As the researchers explained in the paper, the study's aim was 'to investigate whether recent exposure to work-related psychosocial events can trigger the decision to report sick when ill.’

Conflicts with bosses and coworkers raised the chances of taking sick leave

Among employees who were already sick, those who had recently experienced problems with their supervisor were significantly more likely to call in sick. Similar effects were seen among those who had conflicts with colleagues.


Employees also became more likely to take sick leave when they expected an unusually stressful workday involving heavier workloads, fewer staff members, or greater responsibility than usual.

According to the study:

• Problems with a supervisor increased the likelihood of taking sick leave by more than 3.5 times.
  
• Problems with colleagues increased the likelihood by nearly 4.7 times.
  
• Anticipating a very stressful work situation more than doubled the likelihood of reporting sick.
  

Most employees weren't seriously ill

One of the study's key findings was that most sick-leave episodes involved relatively minor illnesses rather than severe medical conditions.

More than half of the reported absences were linked to common ailments such as colds, influenza, viruses, and headaches, suggesting that many workers retained some ability to work but faced a decision about whether they should.

The researchers noted, "Most sick-leave spells happened in relation to acute, minor illnesses that substantially reduced work ability." That distinction is important because it leaves room for workplace conditions to influence the final decision.

Psychology of the decision

Rather than viewing sick leave as a purely medical decision, the researchers describe it as a process shaped by both illness and the immediate work environment. If someone has a severe illness, there is little choice; they simply cannot work. But when symptoms are milder, workplace experiences may become the deciding factor.

The authors concluded, "Exposure to problems in workplace relationships or a stressful work situation seems to be able to trigger reporting sick." They added, "Psychosocial work-environmental factors appear to have a short-term effect on individuals when deciding to report sick."

What the findings really mean

The study does not suggest that employees fake illness to avoid work, nor does it claim that toxic workplaces are the main cause of sick leave. Instead, it suggests that when employees are already unwell, especially with common illnesses like colds or headaches, a difficult boss, conflict with coworkers, or the expectation of a highly stressful day may push them toward staying home rather than working through their symptoms.

In other words, the illness starts the process, but the workplace can determine how that story ends.