Dual diagnosis means you are dealing with two things at once: a mental health condition like depression, anxiety, or PTSD, alongside a substance use disorder. The two are tangled together. Drinking or using can be a way to quiet symptoms, and the substance often makes those symptoms worse over time. At the Hollick Institute, treating one while ignoring the other rarely holds up. Effective care addresses both conditions together, because for most people walking into addiction treatment, this overlap is the norm, not the exception.