Many individuals in Zion who find their way to drug rehab are dual diagnosis clients with co-occurring mental and substance abuse problems. In fact, as many as 1/3 of those who suffer with mental health issues in Zion, Illinois also take part in substance abuse at some point in their lives. These dual diagnosis clients frequently turn to drugs or alcohol to self medicate in an attempt to relieve the symptoms of an underlying psychological condition. Some treatment clients aren't even diagnosed with a psychological condition, and only when they begin to receive treatment at a drug treatment facility is this sort of issue brought to light. This in itself can help resolve addiction issues and put the person in a position to get treatment for both conditions so that they have a good chance of remaining abstinent and psychologically healthy in the future.