Have you noticed that when we are stressed by current situations, we tend to judge ourselves harshly and our minds pull us back into old, painful loops? Recently, I have experienced exactly that. Beyond the wide range of negative feelings from the old wound, I wonder why my mind fixates on ancient archives every time present life gets overwhelming. It felt counterintuitive and illogical: why would I drag up old discomfort when I was already struggling? Am I bullying myself again? Did I never learn anything from mental health?
A form of protection
Surprisingly, it is normal to ruminate more when stressed out. In high-stress situations, our brain’s priority shifts to scanning for potential risks. To a hyper-vigilant brain, the future is an unknown outcome, or the prediction work at the moment is too costly. The present is too slippery to capture, moving too fast.
The past, however painful, possesses one irresistible quality: it has ended. Chapter closed. Credits rolled. We don’t have to guess; we already know the ending. Whether positive or negative, and whether we treat them with emotion or as data, we have built a narrative around them. We’ve already borne the consequences, and we survived them (which we may feel a bit of pride in). At least, we know what we can control now: how to act, feel, and think about them. If past trauma resurfaces more under current stressors, the stressed nervous system will almost certainly trade emotional comfort for cognitive predictability.
Therefore, the truth is actually much simpler: survival. It is the brain’s protective mechanism: I need to ensure your safety. So excuse me for a moment; I now need to prioritize certainty over positivity.
The Default Mode Network
It helps to look at how the brain routes its internal traffic as well. A key structure to look at here is a specific network of interconnected brain regions called the Default Mode Network (DMN).
The DMN gets activated when you aren’t actively focused on an external task: during a break, when you are daydreaming, or mindless scrolling. This network functions as the brain’s built-in self-referential processing unit, responsible for shaping your story, identity, and meaning-making. (Related: Write Yourself a Redemptive Story Proven to Improve Well-Being; Do Our Inner Stories Really Shape the Sense of Self?. Autobiographical Reasoning to Create a Life Story and Identity)
Under relaxed conditions, you can easily switch between active focus and the back-end operation. But under stress, the DMN can remain in the “on” position. Because the DMN relies heavily on autobiographical memory, its overreaction can shift your awareness inward, pull old memories out of the dusty storage unit, and thus “force” you to view current stress through the lens of past identity.
Therefore, while you were stressed and looking for peace, painful memories resurfaced so vividly that they felt like current events, reliving those emotions.
The reinforcement package
However, this survival strategy comes with a package that consists of a series of psychological and physiological mechanisms that kick in when our resources run low.
First, filtering out intrusive memories demands active effort from the prefrontal cortex, which relies heavily on glucose and cellular energy (ATP). When you’re overwhelmed by emotional stress, lack of sleep, or hunger, the mental concierge runs out of energy to keep unwanted information out.
Second, when the prefrontal cortex is fatigued, the amygdala is still highly active. Especially when stressed or tired, the amygdala shifts into hypervigilance and constantly scans for threats. Because it doesn’t have a concept of time, it can’t tell whether the danger is present, past, or a prediction of the future.
Third, the brain can sometimes trick itself into thinking, “If I analyze what happened back then enough times, I can figure out where I went wrong and prevent it from happening again.” While this may look like problem-solving or productivity, it doesn’t identify the problem, gather new data, or offer actionable steps; it only creates the illusion that you can reopen and solve a case that was closed years ago.
Therefore, an old (usually negative) memory haunts you particularly on an exhausting day.
Layers of emotions
Yet, understanding the mechanism alone doesn’t ease the anxiety and resentment. I hear you. And we unfortunately do not stop judging ourselves just because we have intellectually reasoned that we are not at fault.
Partly, that is because emotions have layers. In this case, there are at least two layers of emotions: felt emotions and metaemotions. Felt emotions are what we feel when ruminating. Metaemotions are how we feel about what we feel. (Related: Do We Really Know What We Feel?)
And that is what actually stressed me out.
When old pain resurfaces, we don’t just feel the neutral physiological reality, or even just grief or anger from the original event. Instead, we attack ourselves for having the response in the first place: “Why am I still affected by this?” “It happened years ago. I should be over this by now.” “What is wrong with me again?”
We judge a natural, biological response and turn it into secondary shame, guilt, or frustration. Then we may frame those emotions themselves as a failure.
The distortion we built out of pain
Speaking of thought framing, we need to examine cognitive distortions.
When you are stressed, two specific types of distortion may take over. First, emotional reasoning. The mind falls into the logical trap of believing, “Because I feel unsafe and anxious right now, there must be a real threat present.” It searches the past to justify the current emotional distress, finding an old event to point to as the culprit.
Second, catastrophizing (or overgeneralization). The brain takes a single past failure or trauma and turns it into a universal rule, ignoring all other facts: “Because that went horribly wrong five years ago, everything I try today will end the same way.” Memories are fluid and constructible. What you remember now is usually how you remember it last time rather than a strictly accurate video recording playback. Every time you replay it, you may add some details under the influence of emotions and beliefs. (Related: Why Do Our Memories Actually Reflect the Present? Repeated Emotional Events Make Stronger Memories; Not the Neutral Ones)
Yet, through these distortions, rumination uses past events to create a false sense of preparedness. This is why we feel a bit of relief when ruminating, and we are dragged back to it quickly when stressed.
The social dimension
This is one of the pieces of general advice I have been questioning: seek support, connect with people. Yes, but with whom? Where? How?
Speaking from my own and many survivors’ experience (and deduced from current scientific literature), if you seek support from available sources when chronically wounded, you are highly likely to be retraumatized rather than healed, because your filter on people loosens, as mentioned. If you follow that generic “reach out” advice with a compromised filter and an unstable sense of self, the result can be destructive: you end up connecting with whoever “shows interest.” And those abusers, manipulators, mooches, and parasites love to exploit brilliant people in a vulnerable state by love bombing or being overly friendly at first.
Even worse, depending on your specific circumstances and personal origin, the dysfunctional, unhealthy patterns and dynamics may be the only ones you are familiar with, and thus you actually”feel connected” to those bad sources. Then, you end up stuck in a pattern that should never exist in the first place. (Related: Why Are People Trapped in a Dysfunctional Social Circle?)
Those two points alone should keep you from connecting with whoever is available. Co-rumination, another example, is something risky beyond “trauma-bonding”. Even if you are not considered a survivor, when you are stressed, you talk through your thoughts with someone; then, at some points in your conversation, you both begin to endlessly rehearse the details of a past problem without moving toward resolution or action. It reinforces the loop over and over, validates the threat bias, turns an internal loop into a shared reality… As a result, you emotionally experience the past as an active danger once more. And perhaps you’re wired even more deeply to think that past risk is still active.
Making peace with it
Rumination is trying to make sense of the past and predict what will happen. It is an instinctive response, nothing to be ashamed of.
When under stress, try to ground yourself physically first. The 5-4-3-2-1 Technique (name 5 things you can see, 4 you can touch, 3 you can hear, and 1 you can taste) helped me the most. Mental states are also closely linked to our physiological states; check in on yourself: Am I hungry, thirsty, or tired? To filter out useless information, the prefrontal cortex needs its nutrients.
When you feel a bit calmer, two widely recommended cognitive reframing techniques have helped me the most:
Name the mechanism without judging it. Phrases like “My brain is looking for certainty” or “I am experiencing loss aversion right now” can help. The point is to name the process, which creates immediate psychological distance between you and the emotion.
Separate replay from resolution. This means you can ask yourself questions such as “Does overthinking this right now give me new information or a solution I can act on?” If the answer is the latter, acknowledge that your mind is engaging in the illusion of problem-solving rather than a real one.
Final note
It is not easy. I know.
But don’t take every thought or feeling seriously. The brain is, knowingly, the most powerful, mysterious, and exquisite structure in the world. Many unknowns await discovery and understanding. What we know now is that it can make mistakes, become ill, or simply be too tired. Don’t judge yourself for what you think and feel, because that is judging yourself for being human and experiencing life as a human.
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Disclaimer: This content is for informational purposes only and is not intended to give advice. If you are in crisis, please seek professional help. Always prioritize your well-being.
