People can get addicted to all sorts of substances. When we think of addiction, we usually think of alcohol or illegal drugs. But people become addicted to medications, cigarettes, even glue! And some substances are more addictive than others: Drugs like crack or heroin are so addictive that they might only be used once or twice before the user loses control.

Addiction means a person has no control over whether he or she uses a drug,drinks or smokes.  Someone who's addicted has grown so used to the drug that he or she has to have it. Addiction can be physical, psychological, or both.

Physical Addiction:

Being physically addicted means a person's body actually becomes dependent on a particular substance (even smoking is physically addictive). It also means building tolerance to that substance, so that a person needs a larger dose than ever before to get the same effects. Someone who is physically addicted and stops using a substance like drugs, alcohol, or cigarettes may experience withdrawal symptoms. Common symptoms of withdrawal are diarrhea, shaking, and generally feeling awful.

Psychological Addiction:

Psychological addiction happens when the cravings for a drug are psychological or emotional. People who are psychologically addicted feel overcome by the desire to have a drug. They may lie or steal to get it.