Chronic stress rewires brain to make rest feel threatening, doctor warns

Dr Kunal Sood, an anaesthesiologist and Interventional Pain Medicine Physician, has warned that the compulsive need to stay productive is not always a sign of ambition — it can be a physiological stress response that has quietly reshaped how the brain processes rest.

In an Instagram video shared on Sunday, Dr Sood outlined how prolonged activation of the body's stress systems can condition the nervous system to treat inactivity as a threat, making rest feel uncomfortable rather than restorative. "Did you know constantly feeling the need to 'be productive' can actually be a stress response? When your nervous system stays in fight-or-flight too long, slowing down can start to feel uncomfortable instead of relaxing."

Stress hormones keep the brain on high alert

Dr Sood explained that the sympathetic nervous system and the hypothalamic-pituitary-adrenal (HPA) axis are designed to release stress hormones in response to perceived danger. Under normal circumstances, these systems switch off once a threat has passed. But under chronic stress, that off-switch fails to activate.

"The sympathetic nervous system and HPA axis release stress hormones like adrenaline and cortisol that increase alertness and readiness for action. When these systems stay activated too long, the brain may begin treating everyday life as if the threat never fully ended."

Allostatic load disrupts the brain's natural recovery rhythm

The cumulative toll of repeated stress activation — known as allostatic load — gradually disrupts the brain's ability to shift naturally between effort and rest. Rather than oscillating between activity and recovery, the nervous system becomes locked in a state of sustained alertness.

"Chronic stress increases allostatic load, the cumulative strain created by repeated stress activation. Instead of moving smoothly between effort and recovery, the nervous system becomes biased toward vigilance, productivity, and constant action."

Busyness becomes a coping mechanism

Over time, the brain begins to associate staying busy with a sense of safety and control. Dr Sood pointed to changes in the amygdala — the brain's threat-detection centre — and reduced regulation from the prefrontal cortex as key drivers of this shift. Together, they push the brain toward action as a way of managing uncertainty.

"Chronic stress can make the amygdala more reactive while reducing prefrontal regulation. As a result, staying busy may become a learned coping strategy that temporarily creates a sense of certainty and control."

Rest starts to feel foreign — or threatening

Once the brain has adapted to constant stimulation, periods of stillness can trigger genuine discomfort. People in this state often find themselves feeling anxious during downtime, experiencing guilt when they are not working, or compulsively filling quiet moments with tasks or distractions.

"When the brain becomes accustomed to constant stimulation, rest can feel unfamiliar. People may feel guilty resting, anxious during downtime, or compelled to fill every free moment with tasks and distractions."

Task completion reinforces the cycle

The productivity loop is self-reinforcing. Each time a task is completed, the brain registers a drop in anxiety — and that relief is interpreted as a reward. Over time, the nervous system learns to use work as a tool to suppress discomfort rather than as a means to an end.

"Completing tasks often creates relief and a sense of accomplishment. If anxiety decreases during work but increases during rest, the brain may learn to use constant productivity as a way to regulate discomfort."

Note: This article is for informational purposes only and is not a substitute for professional medical advice.