What is mental health? What it means, common conditions and mental health at work

What mental health means, the most common conditions, how many people are affected and what employers must do, from NHS and HSE guidance.

Last reviewed 3 min readBy Lift College Editorial

CPD guide

Mental health is about how we think, feel and behave. That is how the Health and Safety Executive (HSE) puts it, and it says anxiety and depression are the most common mental health problems. One in four people in the UK will have a mental health problem at some point. HSE says most are mild, tend to be short term and are normally treated successfully. The Lift College Mental Health Awareness Training course covers what it is, the signs and how to start a conversation.

Why mental health is important

The NHS says we all have times when we feel low, anxious or overwhelmed. When low mood lasts, it can start to affect everyday life. HSE says anxiety and depression are often a reaction to a difficult life event, such as bereavement, but can also be caused by work, and problems at work can bring on symptoms or make them worse.

Common mental health conditions

The NHS lists more than 30 mental health conditions, including:

  • depression
  • anxiety and generalised anxiety disorder (GAD)
  • obsessive compulsive disorder (OCD)
  • post-traumatic stress disorder (PTSD)
  • bipolar disorder
  • panic disorder and phobias
  • eating disorders

The NHS list also includes stress, which it describes as a natural response to pressure. HSE says prolonged stress can lead to physical and mental ill health, including anxiety and depression.

Mental health at work

HSE's latest figures, for 2024/25, show 964,000 workers in Great Britain suffering from work-related stress, depression or anxiety, and 22.1 million working days lost because of it. HSE says employers have a legal responsibility to help employees whether work is causing a mental health issue or making it worse. Work-related mental health risks must be assessed like any other health and safety hazard, and where a risk is found, steps must be taken to remove or reduce it as far as reasonably practicable.

Signs someone may be struggling

HSE says a change in the way someone acts, thinks or feels can be a sign of stress, for example:

  • taking more time off or arriving later
  • mood swings or being withdrawn
  • loss of motivation, commitment and confidence
  • being more tearful, sensitive or aggressive

HSE advises managers to talk to the person early, as early action can prevent them becoming more unwell, and to encourage them to see their GP. These signs can also be symptoms of other conditions.

Getting help

If someone's life is at risk, or you do not feel you can keep yourself or someone else safe, the NHS says to call 999 or go to A&E now. For urgent help that is not an emergency, use NHS 111 online or call 111 and select the mental health option. You can call Samaritans free on 116 123. You can refer yourself to NHS talking therapies for anxiety and depression in England without a diagnosis. Our guide on how to get help with mental health covers the options.

Training

Lift College Mental Health Awareness Training is 1 hour in 6 modules, for every employee plus managers and team leaders, with a CPD Standards Office accredited certificate the same day you pass.

Frequently asked questions

What is mental health in simple terms?
How we think, feel and behave, according to the Health and Safety Executive.
What are the most common mental health problems?
Anxiety and depression, according to the Health and Safety Executive.
How many people have a mental health problem?
HSE says one in four people in the UK will have a mental health problem at some point, and that most are mild, short term and normally treated successfully.
Why is mental health important?
Poor mental health can affect everyday life, relationships and work. HSE figures show 22.1 million working days were lost to work-related stress, depression or anxiety in 2024/25.
Is stress a mental health condition?
The NHS includes stress in its list of mental health conditions and describes it as a natural response to pressure. HSE says prolonged stress can lead to anxiety and depression.
Do employers have to look after mental health?
Yes. HSE says employers must assess work-related mental health risks like any other hazard and act to remove or reduce them as far as reasonably practicable.

Sources checked

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