The first step that is taken in helping an alcohol addicts to get back on track is diagnosis. This is the process through which a doctor or a counselor determines what exactly is the problem with addict. It is important because it helps the professional to understand the nature of addiction. Also the doctor wants to be sure what they are treating and that is why they have to perform clinical tests on the patient to know if they are really addicted to alcohol or any other substance. The treatment varies depending on the substance and therefore diagnosis helps the doctor to know what procedure to carry on the patient.