An addiction is a state of being so dependent on something that it is difficult or impossible to do without it for any significant period. It is possible to become addicted to anything, but whatever the addiction is, the person cannot control it. Some symptoms are specific to the addictive substance or activity, but there are general features that occur in all addictions.
These include the development of tolerance—the need for increasing amounts to produce the desired effect; unpleasant physical and psychological symptoms when the substance or activity is stopped; and continuing to use the substance or engage in the activity even though it may be detrimental.
Treatment of addictions depends on the specific substance or activity involved. In general, however, it may include support from family, friends, and self-help groups while reducing use of the substance or the activity, and psychotherapy.
Medication may also sometimes be prescribed—for example, to reduce withdrawal symptoms in drug or alcohol addiction. In some cases, treatment in a specialist rehabilitation center may be recommended.

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