It is quite common for people who have problems with a psychological disorder to also have a co-occurring drug and alcohol abuse disorder. In fact, it is more widespread than one would think and quite a few people presently in alcohol and drug treatment programs in Tranquillity, California may have psychological issues which have just simply been undiagnosed. Treatment professionals at effective alcohol and drug rehabilitation centers in Tranquillity know how to spot persons with co-occurring mental and drug and alcohol abuse issues so that both issues can be handled simultaneously while the person is in treatment. Simply because both must be resolved, the client should not leave treatment until they are psychologically stable, not just abstinent.