Many individuals in Holland who find their way to drug rehab are dual diagnosis clients with co-occurring mental and substance abuse problems. Actually, as many as 1/3 of those who struggle with mental health issues in Holland also become involved in substance abuse at some point in their lives. These dual diagnosis clients often turn to alcohol or drugs to self medicate in an attempt to ease the symptoms of an underlying psychological issue. Some addicted individuals aren't even diagnosed with a psychological condition, and only when they begin to receive treatment at a drug rehab program is this sort of issue brought to light. This alone can sometimes help resolve addiction issues and put the person in a position to receive treatment for both disorders so that they have a good chance of remaining abstinent and psychologically healthy in the future.