In some employment situations stress is considered a macho thing. In other words there is a culture of working late, missing meal breaks and diary loading. This is all very well for a while and may even be exhilarating. Over longer periods however it erodes family life, causes physical ill health and reduces psychological well being. No matter how macho the culture it cannot be sustained for lengthy periods and if left unchecked can lead to breakdown.
Some people are more sensitive to stress than others.
The law says you must take your victim as you find him. Therefore what is stressful to one person may not effect another. If it is clear to an employer that an employee is suffering stress then that employer is obliged by law to do something about it. This may include retraining, improving or increasing resources, rearranging work routines or even moving the worker out of the stressful environment. Either way an employer is entitled to take reasonably practical measures to reduce the stress if he becomes aware there is a problem.