Many addicted individuals in St. David, 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 St. David, Illinois also become involved in substance abuse at some time in their lives. These dual diagnosis clients typically turn to alcohol or drugs to self medicate as a way to ease the symptoms of an underlying psychiatric issue. Some treatment clients aren't even diagnosed with a disorder, and only when they begin to receive treatment at a drug rehabilitation center is this sort of issue discovered. This in itself can sometimes help resolve addiction issues and put the individual in a position to receive treatment for both conditions so that they have a strong chance of remaining clean and sober and psychologically stable in the future.