It is quite common for people who have problems with a psychological disorder to also struggle with a co-occurring alcohol and drug abuse disorder. In fact, it is more common than one would imagine and a lot of individuals presently in drug treatment programs in Boston may have psychological issues which have just simply been undiagnosed. Treatment professionals at proven drug and alcohol rehab facilities in Boston know how to identify individuals with co-occurring mental health and substance abuse disorders so that both issues can be handled simultaneously while the person is in rehab. Because both must be resolved, the individual should not leave rehabilitation until they are psychologically stable, not just off of drubs.