Addiction is a complex phenomenon characterised by a loss of control and compulsive, habitual behaviour. It can refer to physical dependence on substances, such as drugs or alcohol to repeated behaviours or activities that someone feels they have no control over. A person may be addicted to smoking, illegal drugs or prescription drugs. Some people are addicted to gambling, work, solvents, sex, sugar, pornography, tanning beds, shopping, internet and even lip balm. So the list can be extensive.