Many people in Evansville, Illinois who find their way to drug rehab are dual diagnosis clients with co-occurring mental and substance abuse problems. Surprisingly, as many as 1/3 of those who suffer with mental health issues in Evansville also become involved in substance abuse at some time in their lives. These dual diagnosis clients typically turn to drugs or alcohol to self medicate as a way to relieve the symptoms of an underlying psychological issue. Some treatment clients aren't even diagnosed with a psychological condition, and only when they make it to a drug treatment program is this sort of issue discovered. This alone can sometimes help resolve addiction issues and put the person in a position to receive rehabilitation for both disorders so that they have a good chance of remaining abstinent and mentally healthy in the future.