This Practice Note examines issues that may arise where an employee is experiencing work-related stress (or occupational stress), ie stress that may be caused or exacerbated by work, or mental ill health affecting the employee’s work or attendance. The Health and Safety Executive (HSE) defines stress as ‘the adverse reaction people have to excessive pressures or other types of demand placed on them’. Stress is not in itself an illness, but can make individuals ill, eg by leading to conditions such as anxiety and depression. Stress, anxiety and depression can also increase the risk of conditions like heart disease, back pain, gastrointestinal illnesses or skin conditions. According to Acas guidance on supporting mental health at work, common mental health issues include stress (this is not classed as a medical condition but can still have a serious impact on wellbeing), depression and anxiety. Less common ones include bipolar disorder and schizophrenia. In some cases, these conditions may amount to a disability—see: Disability issues, below. This Practice Note covers: • the benefits