Quitting Smoking and Mental Health

The feeling that a cigarette relieves stress is real - but it is caused by nicotine addiction, not by any genuine stress-relieving property of smoking.

Here is what actually happens:

• Between cigarettes, nicotine levels in the blood fall. As they fall, a smoker experiences mild withdrawal - which feels like anxiety, irritability, restlessness, and stress.
• When the smoker lights a cigarette and inhales nicotine, the withdrawal symptoms are rapidly relieved. This feels like stress relief.
• In reality, the smoker has simply relieved the stress that the cigarette itself was causing by feeding the addiction. A non-smoker in the same situation would not have experienced that stress in the first place.

This cycle means that smokers effectively spend their day oscillating between mild nicotine withdrawal stress and the relief of feeding their addiction. Over time, this cycle actually raises baseline anxiety levels compared to non-smokers. Studies show that smokers have higher average levels of anxiety and depression than non-smokers - not lower.

The NHS states clearly: "Smoking doesn't relieve stress - it just reverses the feelings of irritability and anxiety that come with nicotine withdrawal."

A landmark 2014 meta-analysis by Taylor et al., published in the BMJ, reviewed 26 studies and found that quitting smoking was associated with significant improvements in:

• Anxiety
• Depression
• Positive affect (positive emotions and mood)
• Quality of life and stress

The improvements were seen in the general population and in those with diagnosed psychiatric conditions. Critically, the study found that people who quit smoking had better mental health outcomes than those who continued to smoke - challenging the idea that people with mental health conditions "need" to smoke.

The effect sizes observed were comparable to those seen with antidepressant treatment in some studies. This is a striking finding that underscores how much of smokers' "baseline" anxiety and low mood is actually a product of the addiction cycle itself.

The WHO also notes that tobacco dependence and mental health conditions often co-occur, and that integrated support for both - rather than delaying cessation support for people with mental health conditions - leads to better outcomes.

While the long-term mental health benefits of quitting are clear, it is honest to acknowledge that the first few weeks can be genuinely difficult emotionally. Nicotine withdrawal can cause:

• Irritability and anger
• Anxiety and restlessness
• Low mood or mild depressive symptoms
• Difficulty concentrating
• Insomnia

These symptoms are temporary and typically peak during the first 3–7 days after quitting, then gradually resolve over the following 2–4 weeks. They are a normal part of the withdrawal process, not evidence that you need to smoke to be mentally well.

If you have a history of depression or anxiety, it is sensible to speak to your GP before quitting and to have additional mental health support in place. Your GP can also discuss medication options (such as varenicline or bupropion) that may ease both withdrawal and mood symptoms simultaneously. The risk of a depressive episode during quitting is real but manageable with the right support.

Building good mental health support into your quit plan significantly improves your chances of success and your wellbeing during the process. Consider the following:

• Cognitive Behavioural Therapy (CBT): CBT techniques are used within NHS Stop Smoking Services and have strong evidence for helping people manage cravings, negative thoughts, and the psychological side of addiction. Many stop smoking services incorporate CBT elements.
• Exercise: Physical activity is one of the most evidence-based interventions for both smoking cessation and mental health. Exercise releases endorphins and dopamine, directly countering some of the mood disruption of nicotine withdrawal. Even 20–30 minutes of moderate activity can lift mood noticeably.
• Social support: Research consistently shows that social support from family, friends, and support groups improves quit rates. Talking openly about what you are going through reduces isolation and stress.
• Mindfulness and stress management: Mindfulness-based techniques have been shown to help with both craving management and general anxiety. Apps and free online resources are widely available.
• Professional mental health support: If you are struggling with significant depression, anxiety, or other mental health conditions, seek professional support from your GP, a therapist, or a mental health helpline. Quitting smoking is compatible with mental health treatment - in fact, it supports it.

Remember: the difficult feelings you experience when quitting are temporary. The mental health benefits on the other side - reduced anxiety, improved mood, better sleep, and greater sense of control - are long-lasting and real.