Addiction is more commonly associated with alcohol, gambling and drugs. But there are other behavioural addictions that have a massive impact on people's day to day lives.
According to the NHS, addiction is defined as not having control over doing, taking or using something to the point where it could be harmful to you. There are a number of ways a person may develop an addiction.
Drugs and nicotine can affect the way you feel, both mentally and physically. These feelings can be enjoyable, and create a powerful urge to use the substances again.