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A useful way to think about addiction
Addiction is not defined by one bad decision, occasional over-use or simply enjoying something. The concern is the pattern: increasing priority, reduced control, repeated harm and difficulty changing even when the person wants to.
Depending on the substance or behaviour, clinicians may use terms such as substance use disorder, alcohol dependence, drug dependence, gambling disorder or another recognised diagnosis. Everyday language is less precise, so context matters.
Biology, learning, mental health, stress, environment, relationships and access to substances or behaviours can all influence risk. Responsibility for change can coexist with compassion and evidence-based care.
Why a pattern can become hard to interrupt
Addiction often involves a reinforcing loop rather than one isolated decision. Different people enter and leave this loop in different places.
Common features
- Repeated difficulty controlling how much, how often or how long you use or engage.
- Strong urges or cravings.
- Giving the substance or behaviour increasing priority over other parts of life.
- Continuing despite physical, psychological, financial, occupational or relationship harm.
- Repeated attempts to cut down or stop that do not last.
- Tolerance or withdrawal in some substance-related problems.
What about behavioural addictions?
Not every repetitive or compulsive behaviour is formally classified as an addiction. Gambling disorder is a recognised behavioural addiction. Gaming disorder is recognised in ICD-11, while terms used online for shopping, pornography, food or social-media “addiction” can describe real distress but do not all map neatly onto the same diagnostic framework.
That distinction matters because labels should help people find appropriate care, not over-medicalise every difficult habit.
What this page is anchored to
We summarise guidance in original plain English. Open the primary sources if you want to check the underlying recommendations.
When should I seek help?
If a substance or behaviour is causing harm, taking over more of your life, affecting work or relationships, creating financial problems, or becoming difficult to control, you do not need to wait until it becomes “severe enough” to ask for help.
Explore common warning signs →
This page provides general educational information and does not replace assessment or advice from a healthcare professional. If you are worried about severe withdrawal, overdose, immediate danger or a mental health emergency, use our urgent help guidance.
Frequently asked questions
No. Addiction involves learned behaviour, reward and motivation systems, personal vulnerability, environment and often mental or physical health factors. Choice still matters, but the pattern can become genuinely difficult to change.
Not always. Physical dependence can occur with some prescribed medicines without the wider behavioural pattern usually meant by addiction. Addiction can also occur without prominent physical withdrawal.
Yes. Recovery is common and can take different forms. It may involve changes in substance use or behaviour, treatment, relationships, routines, health and how a person responds to future setbacks.