Why the Two Conditions Feed Each Other
Anxiety shows up first for some people. For others, it starts with drinking or using, and the low moods follow. Trying to sort out which came first can feel like an endless argument in your own head.
Here is what usually happens. A person feels anxious, low, or haunted by something painful. A drink or a pill quiets it for a while. That relief is real, which is why it makes sense to reach for it again.
But the quiet does not last. Substances change how the brain handles mood and stress. The anxiety comes back sharper. Sleep gets worse. So does depression. Add the daily fallout, missed work, strained relationships, money stress, and the original symptoms grow heavier.
Heavier symptoms push a person back toward the thing that once helped. That is the loop. Each turn makes the next one easier to reach and harder to stop.
This matters for how you think about your loved one. Neither condition simply caused the other. The mental health struggle and the substance use are both real. Both deserve care.
Treating only one side tends to leave the other free to pull the whole thing back around. That is why both are addressed together, not in separate rooms on separate days.