It is quite common for individuals who are afflicted with a mental health issue to also be plagued by a co-occurring substance abuse disorder. In fact, it is more prevalent than one would think and a lot of individuals presently in drug and alcohol rehabilitation programs in Redwood City, CA. may have psychological disorders which are often undiagnosed. Rehab professionals at effective alcohol and drug treatment programs in Redwood City, California know how to identify individuals with co-occurring psychological and substance abuse disorders in hopes that these two issues can be simultaneously addressed while the person is in rehabilitation. Because both need to be addressed, the individual should not leave rehab until they are mentally stable, not just sober.