This morning a client, a calm and senior leader, admitted she had snapped at her teenage son over a spilt glass of water, then sat in her parked car and cried at her own reaction. She is not a harsh woman. She had simply been ambushed from the inside, in the way most of us are more often than we would like to confess. What she felt has a name that has quietly become one of the most searched phrases in emotional health: hormonal hijack. It is the strange moment when your body makes a decision before your mind is even invited into the room.
What a hormonal hijack actually means
A hormonal hijack is what happens when a surge of stress chemistry overrides your capacity to think clearly, and you react in a way your calmer self would never have chosen. The trigger is usually small. A tone of voice. A message left on read. A driver who cuts in. Within a second or two, your amygdala, the brain’s threat detector, has decided you are under attack and fired the alarm. Your sympathetic nervous system, the body’s accelerator, floods you with adrenaline and noradrenaline. Your heart quickens, your jaw tightens, and your prefrontal cortex, the thoughtful part that weighs consequences, goes briefly quiet. You are, for a moment, all engine and no steering.
The psychologist Daniel Goleman gave the wider version of this a memorable label, the amygdala hijack, in his 1995 work on emotional intelligence. I use the phrase hormonal hijack because it puts the spotlight where clients actually feel it, in the body, in the flood of chemistry that arrives uninvited and leaves just as abruptly.
Meet the borrowed self
I have a name for the person who shows up during a hijack. I call it the borrowed self. The borrowed self is the impulsive, defensive, slightly younger version of you that your stress chemistry sends in when the alarm rings, and who vanishes the moment the chemistry clears, leaving you to apologise for things you did not quite choose to do.
It helps to picture two versions of you standing side by side. The considered self listens, pauses, and remembers the relationship. The borrowed self reacts, defends, and remembers only the threat. Most regret in adult life lives in the gap between the two.
A hormonal hijack does not make you a bad person. It makes you a temporarily borrowed one. The work is not to never be hijacked, but to shorten the ransom.
The everyday examples we rarely name
Hormonal hijack is not reserved for dramatic breakdowns. It is a daily, domestic, deeply ordinary event. You will recognise more of these than you expect.
- The email that makes your chest tighten, so you fire back a reply you would soften if you read it an hour later.
- The partner who uses that particular tone, and suddenly you are arguing about the washing up as though it were a moral trial.
- The meeting where one raised eyebrow convinces you that you are being judged, and you either shrink or sharpen.
- The moment your child does something small and you hear your own parent’s voice come out of your mouth.
- The comment online that hijacks your afternoon, long after you have closed the app.
None of these people are villains. They are simply nervous systems reacting faster than reason can catch up. Once you can name the borrowed self, you stop mistaking a chemical event for your true character.
Why it feels so personal
Here is the part that offers real relief. According to the neuroscientist Jill Bolte Taylor, the initial chemical surge of an emotion moves through the bloodstream and clears in roughly ninety seconds. Anything you feel after that, she suggests, is being kept alive by the story you keep telling yourself about what happened. This is a clinician’s observation rather than a stopwatch law, and slower stress hormones such as cortisol can linger far longer, but the principle holds in daily life. The acute hijack is brief. The grudge is a choice.
Sit with three quiet questions. When you last lost your composure, who arrived, the considered self or the borrowed one? How long did the chemistry actually last, and how long did you keep it alive afterwards? And what would change in your closest relationship if you halved that second number?
Much of what we call temperament is really an unexamined pattern, and many of these patterns are inherited long before we choose them. I have written elsewhere about the inherited patterns we carry from the generations before us, and how much of adult reactivity is old survival wiring firing in a perfectly safe room.
The gap where you get yourself back
You cannot stop the first surge. The alarm is faster than thought, and trying to suppress it only adds shame to stress. What you can train is the recovery. This is the real terrain of self-regulation, and it is a skill, not a personality trait.
Three practices help. First, name it as it rises. Research on affect labelling, the simple act of putting a feeling into words, shows that naming an emotion quietens the very brain regions driving it. Saying “I am hijacked right now” is not weakness, it is a handbrake. Second, lengthen your exhale. A slow out-breath nudges the body’s brake, the parasympathetic system, back online faster than any pep talk. Third, buy time before you act. The rule I give clients is simple. Feel first, decide second, send nothing in the first ninety seconds. Much of mature emotional regulation is really the discipline of the delayed response.
A quieter kind of strength
We tend to admire people who never seem to get triggered. I have come to admire something rarer, the person who gets triggered like everyone else, notices the borrowed self arriving, and gently declines to hand over the keys. That is not the absence of emotion. It is the presence of self.
So the next time your chest tightens and a sharper version of you steps forward, you might simply say, quietly, “not you, not now.” Then wait for the real you to come back. It always does.
If you would like to understand where your own hijacks tend to strike, and what they are quietly protecting, you are welcome to book a fifteen-minute conversation with me. One honest hour of noticing can change a decade of reacting.
