It is quite common for people who have problems with a mental health disorder to also have a co-occurring drug and alcohol abuse disorder. Frankly, it is more prevalent than one would assume and many people currently in drug and alcohol treatment centers in Greenville, California may have psychological issues which are often undiagnosed. Treatment specialists at effective alcohol and drug treatment facilities in Greenville know how to identify individuals with co-occurring psychological and substance abuse disorders in hopes that both issues can be simultaneously addressed while the individual is in treatment. Because both must be resolved, the person should not leave treatment until they are mentally stable, not just sober.