Many people in Twain who end up in 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 Twain, California also become involved in substance abuse at some point in their lives. These dual diagnosis clients often turn to drugs or alcohol to self medicate as a way to alleviate the symptoms of an underlying psychiatric condition. Some addicts aren't even diagnosed with a disorder, and only when they make it to a drug rehabilitation facility is this sort of issue uncovered. This in itself can sometimes help resolve addiction issues and put the person in a position to receive rehabilitation for both conditions so that they have a good chance of remaining abstinent and psychologically healthy in the future.