Addiction is a state of physical dependence where the person does not have control over doing, taking or using something harmful. There is no single reason why an addiction develops – some people find that using alcohol or drugs changes the way they feel. If a person finds that they enjoy these feelings they might have a strong desire to repeat them.
With substances, the more a person uses them, the more tolerant their body becomes, until they need it more frequently and in larger amounts to achieve the same effect. If a person with an addiction stops using the substance that they are addicted to, they will experience psychological or physical withdrawal symptoms (or both).
Find out more about addiction in this short film.
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