Can some one help me

For this discussion, define and explain dual-diagnosis and how it should be considered separately from substance abuse alone.  In your discussion, include thoughts based on evidence (research) regarding how substance abuse may result in mental illness as well, or how those with a mental illness may be included to abuse substances (“self-medicate”).  In other words, discuss whether the “chicken or the egg” comes first in regards to dual-diagnosis. 

As always, be sure to use and cite sources as the foundation for your information and apply your critical thinking skills in your discussion