Does emotional suppression really cause depression and suicide risk?
Yes, and the evidence is strong. A massive network analysis of 9,400 Chinese participants mapped how different psychological factors connect. Emotional suppression was the most central node in the entire network, meaning it was the most influential factor linking depression, digital burnout, and poor sleep. The direct connection between suppression and depression was very strong (0.890 on a scale where 1.0 is a perfect link), and suppression was also tightly linked to digital burnout (0.848) [2]. This means that people who habitually suppress emotions are much more likely to become depressed and feel burned out by digital life.
The link to suicide is also real. In a series of three studies (total 988 participants), researchers found that people who strongly endorse 'honor' norms (like protecting reputation) suppress emotions to avoid looking weak. This suppression then leads to depression, which in turn increases suicide attempts and suicidal thoughts [1]. The pathway is clear: suppression → depression → higher suicide risk.
Does suppression hurt your body as well as your mind?
Yes, it creates measurable physical stress. In a study of 117 children aged 9-10, those who habitually suppressed emotions showed higher skin conductance levels (a direct measure of physiological arousal/stress) while watching a sad movie, even though they didn't report feeling sadder. Their bodies were stressed even when their minds didn't register it [4]. This suggests that suppression puts a hidden strain on the body's stress systems.
In adults with depression, suppression has a deceptive short-term benefit but a long-term cost. In an experiment with 80 veterans, those who suppressed emotions during a sad mood induction showed reduced physiological reactivity (lower respiration and skin conductance) on day one, but one week later they reported significantly less positive affect [6]. The body's stress response was temporarily dampened, but the emotional cost showed up later. This pattern—short-term relief, long-term harm—is a hallmark of why suppression is so damaging.
How does suppression damage relationships and overall wellbeing?
Suppression erodes the quality of your closest relationships, which is itself a major health risk. In a study of 93 people in 37 new venture teams, researchers found that when team members suppressed emotions, it damaged relationship viability through two pathways: it made the suppressor feel less authentic (which hurt the relationship), and it made others perceive the behavior as inappropriate. The negative effect through lost authenticity was stronger than any positive effect [5]. A follow-up two years later showed that both low relationship viability and high suppression predicted whether the venture would survive [5].
Overall wellbeing also takes a direct hit. A study of 64 participants found a significant negative correlation between emotional suppression and wellbeing, and suppression significantly predicted lower wellbeing in a regression model [3]. The effect was similar whether or not people had a chronic health condition, meaning suppression harms everyone, not just those already ill.
Sources used in this answer
The role of emotional suppression and emotional beliefs in explaining the honor‐suicide link
Across three studies (total N=988), honor endorsement predicted emotional suppression to avoid appearing weak, and suppression indirectly explained the link between honor and suicide attempts/ideation through depression.
Network analysis of depression emotion suppression digital burnout and protective psychological factors
In a network analysis of 9,400 Chinese participants, emotional suppression was the most central node, with strong positive connections to depression (0.890) and digital burnout (0.848), and negative connections to sleep quality and resilience.
The cost of ‘Being Strong’: Exploring the relationship between emotional suppression and wellbeing.
In 64 participants, emotional suppression significantly predicted lower wellbeing, and the effect was not moderated by chronic health condition status.
Hidden feelings: Expressive suppression in middle childhood and links with physiology and negative emotion.
In 117 children aged 9-10, higher trait emotional suppression predicted greater skin conductance (physiological arousal) during a sad movie, but not increased subjective sadness.
Holding Back or Letting Go? The Effect of Emotion Suppression on Relationship Viability in New Venture Teams
In 93 members of 37 new venture teams, emotional suppression damaged relationship viability through reduced authenticity and perceived inappropriateness; both suppression and low viability predicted venture failure at 2-year follow-up.
Suppression and acceptance in unipolar depression: Short‐term and long‐term effects on emotional responding
In 80 veterans with depression, suppression reduced physiological reactivity (respiration and skin conductance) on day one but led to decreased positive affect one week later, showing short-term benefit but long-term cost.