Published: 12:01 AM, 17 April 2026
Breaking the Loop of Worries: The Biology Behind Overthinking and How to Reclaim Your Mind
Md. Abul Bashar
Imagine waking up in the middle of the night. Nothing is wrong. The room is quiet. The world outside is asleep. Yet your mind is not. A single thought appears something you said earlier in the day, a decision you haven’t made, a possibility you cannot control. Within seconds, that one thought multiplies. It stretches into conversations that never happened, outcomes that may never come, fears that feel strangely real. You turn to the other side, hoping sleep will return. It doesn’t. Instead, the same thoughts come back, circling like restless birds that refuse to land. Many of us know this experience intimately. We call it overthinking. We call it anxiety. Sometimes, we call it a personal weakness, something we should be able to “just stop.”
But what if the truth is different? What if this endless loop is not a flaw in who we are, but a reflection of how our brain was designed to protect us? The human brain is not built for peace. It is built for survival. Long before modern life, our ancestors lived in environments filled with real and immediate threats. A sudden sound in the bushes could mean danger. A wrong decision could cost a life. In such a world, a brain that constantly scanned for problems, that replayed situations, that anticipated risks, was a gift. Overthinking, in that context, was not a burden. It was an advantage. But evolution has not caught up with modern life. The dangers we face today are rarely physical. They are emotional, social, and psychological. A delayed reply to a message, an uncertain future, a difficult conversation, a mistake at work, these are not life-threatening. Yet the brain often treats them as if they are.
And so, it keeps thinking. Not because it wants to disturb us, but because it believes it is helping.
Throughout the day, our brain processes an enormous amount of information. Most of it happens silently, beneath our awareness. But something interesting happens when a thought carries even a small trace of fear or uncertainty, it becomes “sticky.” The brain holds onto it, turns it around, examines it from every angle. That is where the loop begins. Behind this process lies a delicate chemistry. Invisible to us, yet powerful enough to shape every emotion we feel. There are moments when everything seems manageable, when the mind feels clear, when problems appear solvable. At other times, the same problems feel heavier, more complicated, almost unbearable. Often, the difference lies not in the situation, but in what is happening inside the brain.
There is a chemical that quietly supports calmness, helping thoughts move smoothly instead of getting stuck. When it is present in balance, we feel steady, grounded. But when it dips even slightly, our mind becomes more sensitive. Small concerns start to feel larger than they are. A minor issue begins to echo louder than it should. Then there is another force inside us, the one that fuels motivation. It pushes us to act, to achieve, to move forward. Yet when the mind becomes overloaded with thoughts, this same force begins to fluctuate. One moment, there is urgency, everything must be done immediately. The next moment, there is exhaustion, nothing feels possible anymore.
Between these two extremes, many people find themselves stuck. At the same time, the brain carries an ancient alarm system. Whenever it senses danger, real or imagined, it prepares the body to respond. The heart beats faster, muscles tighten, attention sharpens. It is an extraordinary system, when the danger is real. But when the signal is false, when the threat exists only in thought, psychologists says that the body still prepares for battle. And with no real enemy to confront, that energy has nowhere to go. It settles into restlessness. It transforms into anxiety. It fuels the very thoughts that triggered it. There is also, interestingly, a natural braking system within the brain. A quiet mechanism designed to slow things down, to calm the storm, to bring the mind back to stillness. But like any system, it can weaken under constant pressure. When stress becomes a habit rather than an exception, the brakes lose their strength. And then, the thoughts keep moving. Faster, louder, more persistent.
This is how a simple concern becomes a loop. A thought appears, the brain reacts, the body responds, the chemistry shifts and the thought returns, stronger than before. Round and round it goes, until it feels impossible to step out. It is easy, in those moments, to believe that something is wrong with us. But perhaps nothing is wrong. Perhaps the brain is simply doing what it has always done, trying to protect us, even when protection is not needed. The more important question, then, is not how to stop thinking entirely, but how to gently guide the mind back to balance. The answer does not lie in force. It lies in small, consistent shifts. Consider the way a day begins. A person who steps into sunlight, even for a short while, often feels a subtle lift in mood. A quiet walk, a conversation with someone who brings comfort, a moment of connection, these are not just pleasant experiences.
They are signals to the brain that the environment is safe. Slowly, the mind begins to relax. In contrast, a day filled with constant digital stimulation, endless scrolling, and fragmented attention creates a very different rhythm. The mind jumps from one thing to another, never settling, always searching for the next input. It is not surprising that, later, it struggles to be still. Sleep, too, plays its quiet role. A restless night can make the next day feel heavier, more uncertain. Thoughts that would normally pass by begin to linger. The mind becomes less forgiving, more reactive.
Yet, despite all this complexity, there is something remarkably simple about the way change begins. It often starts with awareness. A person sitting with a racing mind may choose to take a pen and write. At first, the thoughts appear scattered, chaotic. But as they move from the mind onto paper, something shifts. What felt endless now has shape. What felt overwhelming now has boundaries. The brain, in its own way, understands: this has been processed. There is no need to repeat it endlessly. Another person may choose a different approach. Instead of trying to silence the thoughts, they give them a place, a specific time during the day when worrying is allowed. It sounds unusual, almost counterintuitive. But the mind, when trained gently, begins to cooperate. Thoughts that appear at the wrong time are postponed, not suppressed. “Later,” the person tells themselves. And surprisingly, later often feels different.
There are also moments when the mind cannot be reasoned with, when logic feels distant and ineffective. In those moments, the body becomes the doorway. A slow breath. A short walk. A glass of water. Small actions, almost insignificant on the surface, yet powerful enough to interrupt the cycle. Because sometimes, calming the body is the fastest way to calm the mind. And then there is uncertainty, the silent force behind much of our overthinking. We want answers. We want clarity. We want to know what will happen, how things will unfold, whether we will be okay. But life does not always offer that certainty. Learning to live with unanswered questions is not easy. It requires a different kind of strength, the ability to pause and say, “I don’t know right now.” Not as a defeat, but as acceptance. In that acceptance, something softens. The urgency fades. The loop loosens its grip. Over time, these small shifts begin to reshape the way the mind responds. The fast, reactive patterns that once dominated start to slow down. A more reflective, steady way of thinking quietly grows stronger. Not overnight. But gradually. And in that gradual change, something important becomes clear.
Overthinking is not a sign that a person is broken. It is a sign that the mind is active, alert, deeply engaged with the world. The goal, then, is not to eliminate this activity, but to understand it. To recognize when the brain is offering protection and when it is creating unnecessary noise. There is a quiet moment that comes with this understanding. A moment when a thought begins to spiral, and instead of being pulled into it, a person pauses and reflects: “My mind is trying to keep me safe.” And then, gently: “Is this a moment that truly needs protection?” Often, the answer is no. And in that space between the thought and the response, something shifts. The loop weakens. The mind softens. And for the first time in a while, there is a sense of quiet, not because the thoughts have disappeared completely, but because they no longer control the moment. That quiet is not a switch we can press. But it is something we can learn to return to again and again.
Md. Abul Bashar is the Country Representative of a US based
International NGO located in
Dhaka, Bangladesh.
