Rumination is one of the similarities between anxiety and depression. Ruminating is simply repetitively going over a thought or a problem without completion. When people are depressed, the themes of rumination are typically about being inadequate or worthless. The repetition and the feelings of inadequacy raise anxiety and anxiety interferes with solving the problem. Then depression deepens.
Brain function plays a role in rumination in several ways, but one significant aspect of brain function relates to memory. People remember things that are related to each other in neural networks. And when people enter a 'woe is me' network the brain lights up connections to other times they felt that way. Ruminating is worsened by another difficulty of the depressed and anxious brain: inability to flexibly generate solutions. Brain chemistry makes it hard to switch to another perspective to find the way out of problems, so rumination intensifies. Both anxiety and depression are then reinforced.
Rumination can be switched off by two good methods: 1) get out of the negative neural networks and 2) tackle one problem at a time with planning.
First, stop ruminating on negatives and activate a neural network of times when everything worked out okay. These might be hard to remember. Neural networks are triggered by mood, and your mood might have connected to other moods when you were afraid of bad outcomes.You can deliberately decide to recall instead the times when things worked out even though you had been afraid. Those networks of anxiety can lead into remembering positive outcomes. However, ruminating may get you too negative to shift into a network of positive thoughts without a memory jogger. What can shift you into a different network?
The idea of going into another network is not to get lost in old memories but to find a way into a positive neural network from which you may spring board into a solution to your problem.
Rumination might prevent you from solving the problem or from moving on if you do not have a solution at the moment. Try to unhook problems from each other to see if you have an actual problem you can solve or just a worry to eliminate.
One example of this is a man who was decidedly depressed and anxious about his worklife that was fraught with debt, angry colleagues, and overwhelming reports for expenses and hours put in. He actually knew what to do about the debt, but rather than saying to himself, "I know what I will do," and setting that problem aside, he tangled it up with a different problem. "I know what to do about the debt, but everyone will find ways to tell me they are angry about it." Now he was ruminating on what to say to make them be less angry. Then he thought, "I wish I could walk away from them. If I can get caught up with my expenses and reports, I could consider looking for another job," and he began ruminating about whether he could find a different job. The debt problem had nothing to do with how he wanted everyone happy, and neither affected finding the time to do his paperwork and none connected to how hard it is to find new work. But he connected unrelated problems and now could not let go of any of them. If this kind of rumination sounds like the way you go from one problem to another:
The better you get at interrupting rumination, the lighter your depression will become. It is possible to stop brain patterns that contribute to anxiety and depression by stopping rumination. It gets easier the more you practice, so stick with it and you will soon be able to do it automatically.