If patterns of emotional flooding or disproportionate reactions are significantly affecting your relationships or wellbeing, support is available. UK: Samaritans (116 123, free, 24/7). Mind (0300 123 3393). International:International Association for Suicide Prevention crisis centre directory at iasp.info/resources/Crisis_Centres. Crisis Text Line — text HOME to 741741 (US, UK, Canada, Ireland).

What emotional flooding actually is

John Gottman’s decades of research on couples in conflict identified what he called emotional flooding — not simply intense emotion, but a specific physiological threshold being crossed. When flooded, the amygdala becomes overactive, the sympathetic nervous system activates, heart rate elevates, breathing shallows, and the prefrontal cortex — the part of the brain responsible for nuanced thinking, proportionate response, and strategic reasoning — goes substantially offline.

The critical point is the threshold. It is not fixed. It is determined by the accumulated emotional load the person is carrying before the triggering event occurs. An entrepreneur who is well-rested and not carrying significant unprocessed distress has a high flooding threshold. The same entrepreneur during a period of chronic stress, sustained suppression, unprocessed grief, or accumulated anxiety has a substantially lower one.

The minor critical comment, the slightly dismissive investor tone, the small team misalignment — these cross the lowered threshold and produce the flooding response. The trigger is small. The response is the response to everything that was already there.

Why the threshold drops

Three compounding processes lower the flooding threshold over time, making disproportionate reactions predictable rather than mysterious.

Chronic stress raises the baseline cortisol level and sensitises the amygdala — lowering the stimulation required to trigger a full threat response. This is the allostatic load mechanism established in the burnout research: sustained HPA axis activation does not simply produce tiredness. It structurally reduces the nervous system’s regulatory capacity, making flooding increasingly likely at decreasing provocation.

Suppressed emotional content accumulates. As covered in the previous article (https://courben.co/article/the-psychological-cost-of-keeping-it-together-when-everything-inside-you-is-falling-apart/) , surface acting — performing composure while internally distressed — prevents the processing of the emotional material it suppresses. An entrepreneur who has been performing confidence and calm for their team for three months while internally afraid has been adding to an unprocessed emotional reservoir without discharging it. Each new trigger meets not just the current moment’s emotional content but the accumulated, unprocessed content of months of suppression.

Past wounds lower the threshold at specific thematic triggers. The amygdala stores emotional memories and fires not at the actual threat level of the current stimulus but at the threat level of the historical pattern it matches. A mildly critical comment from an investor matches the pattern of childhood experiences of critical authority figures. A small team misalignment matches historical experiences of abandonment or betrayal. The amygdala fires at the memory’s threat level. The present moment is irrelevant to the calculation.

Why it is never about the small thing

This is the article’s central claim and the most important insight for anyone who has ever looked back at a disproportionate reaction and found it genuinely inexplicable.

The reaction was proportionate. It was proportionate to the historical pattern the trigger matched, not to the trigger itself.

The small thing provided the outlet. The reaction belongs to the accumulated load. The investor’s slightly dismissive tone activated a pattern the nervous system has been tracking since long before the business existed. The team’s minor misalignment activated a threat response whose roots predate the company by decades. The flooding is real. Its cause is not the thing that appeared to cause it.

The most practically useful question after a disproportionate reaction is not “was my response proportionate?” — it clearly was not, and examining that question produces only shame and confusion. The useful question is “what does this situation remind me of?” The answer to that second question is almost always more informative than anything the first question generates.

The team experience of a flooded entrepreneur is also worth naming directly. A leader whose flooding threshold has been lowered by chronic stress produces unpredictable emotional reactions to minor friction. The team learns that certain interactions carry unpredictable emotional risk and responds by reducing honest communication, avoiding difficult topics, and managing the entrepreneur’s emotional state rather than doing their best work. The flooding is not just a personal cost. It is an organisational one.

If the pattern described here — recurring disproportionate reactions, consistently noticing afterwards that the reaction vastly exceeded the trigger, difficulty identifying why specific situations produce such intensity — is significant and persistent, that is worth taking to a psychologist rather than working through with self-awareness alone. EMDR and trauma-focused approaches specifically address the emotional memory patterns the article describes, and are available through GP referral in the UK or privately.

A book worth reading alongside this

Mindsight by Daniel Siegel is the most directly applicable starting point. Siegel’s treatment of “integration” — the neurological capacity to hold the present moment as distinct from historical emotional activations — and his “name it to tame it” framework for affect labelling as a means of reducing flooding, maps precisely onto the mechanisms this article describes. For any entrepreneur who wants to understand the neuroscience of why the past keeps arriving in the present, it is the most rigorous and most readable place to start.

This article discusses psychological patterns documented in research on emotional flooding and stress responses. It is not designed to identify, diagnose, or assess any psychological condition, and it is not a substitute for professional support. If these patterns are significantly affecting your relationships or wellbeing, speaking with a psychologist is the appropriate next step.

This article is for educational and informational purposes only. It is not a substitute for professional psychological advice, diagnosis, or treatment. If you are experiencing significant psychological distress, please consult a qualified mental health professional.

Sources: Gottman, J.M. (1994), What Predicts Divorce?, LEA. LeDoux, J.E. (1996), The Emotional Brain, Simon & Schuster. McEwen, B.S. (1998), Annals of the New York Academy of Sciences, 840. Pennebaker, J.W. (1986), Journal of Abnormal Psychology, 95(3).