The Role Of Tears In Chemical Stress Release

The three types of tears — basal, reflex, and emotional — are produced by the same lacrimal gland system but are chemically distinct. Basal and reflex tears are composed primarily of water, electrolytes, proteins, lipids, and mucins. Their function is maintenance and protection.

Emotional tears contain this base composition and additionally include:

- ACTH (Adrenocorticotropic hormone) — a pituitary hormone that drives cortisol production and is a reliable marker of stress system activation - Leucine-enkephalin — an endogenous opioid (endorphin) that functions as a pain regulator and mood mediator - Prolactin — a hormone elevated under chronic stress; also the hormone that is higher in women than men, which may partly explain why women have a lower threshold for emotional tears - Potassium and manganese — minerals present in higher concentrations in emotional tears than in reflex tears

William Frey II, a biochemist at the Ramsey Medical Center in Minnesota, conducted the foundational research on this topic in the 1980s, published in his book Crying: The Mystery of Tears (1985). His methodology involved having subjects collect emotional tears (while watching sad films) and reflex tears (from onion fumes) separately, then comparing the chemical composition.

The finding that emotional tears contained stress hormones led Frey to hypothesize that crying functions as an excretory process — analogous to sweating and urinating — for the removal of stress-related biochemical waste. The body, in other words, uses tears as one channel for clearing the chemical aftermath of emotional stress.

Subsequent research has been consistent with this model, though some scientists note the need for more controlled studies. The concentration of stress hormones in tears is modest — tears are not the only excretory pathway — but the finding is reliable and the functional significance appears real.

Beyond the excretory mechanism, crying has a second physiological function: it activates the parasympathetic nervous system.

The autonomic nervous system has two main branches. The sympathetic branch governs the arousal response: elevated heart rate, cortisol release, increased respiration, muscular tension, blood redirected to large muscle groups. This is the stress state.

The parasympathetic branch governs the restoration response: slowed heart rate, lower cortisol, deeper breathing, digestion, tissue repair. This is the recovery state.

During intense emotional crying, several observable things happen that indicate parasympathetic activation: - Heart rate and blood pressure initially increase, then drop below baseline - Respiration deepens and slows - Muscle tension decreases after the acute phase - People report subjective calming, heaviness, and fatigue

This pattern — arousal followed by resolution — is the hallmark of a completed stress response cycle. The crying is not just the emotional discharge. It's the physiological completion of the arousal-recovery arc.

Research by Lauren Bylsma (University of Pittsburgh) on the conditions under which crying produces relief found that the setting and social context matter. Crying in a safe, supportive environment tends to produce mood improvement and physiological relief. Crying alone or in a hostile environment is less reliably relieving and sometimes produces increased distress. This suggests that the social dimension of tears is not incidental — the co-regulation that comes from a witnessing other is part of the full recovery mechanism.

One of the consistently documented findings in tear research is that women cry more frequently and at lower thresholds than men across nearly all cultures studied. The biological contribution to this difference involves prolactin.

Prolactin — produced in the pituitary gland — is present in women at concentrations approximately 60% higher than in men after puberty. Prolactin receptors are present in the lacrimal glands, and prolactin directly influences tear production. Higher prolactin levels lower the threshold for tear activation.

This is not the whole story — social conditioning, cultural permission, and context all influence both male and female crying frequency. But it's a significant biological component that is often ignored in the cultural conversation. Men have been conditioned to suppress tears, yes. They also have a different biochemical baseline for tear threshold. Both are real.

What this means: the cultural prohibition against male tears is doubly costly. Men may need more deliberate effort to access the crying response than women do, AND they face more external prohibition. The result is that the stress excretory pathway gets blocked for a population that is already at a biochemical disadvantage for activating it.

Research consistently shows men die younger, report lower emotional wellbeing, and have higher rates of suicide than women. The suppression of emotional expression mechanisms — of which tear suppression is one — is a likely contributor, not a coincidence.

The injunction against crying is not universal and not ancient. It varies significantly across cultures and has changed historically within cultures.

In ancient Mediterranean cultures, weeping was not only acceptable but expected at funerals, in grief, in moments of profound significance. Homer's heroes wept openly and frequently. The Psalms in the Hebrew tradition are full of weeping as a legitimate form of prayer and expression. Medieval European culture had practices of communal grieving that included ritual tears.

The modern prohibition — particularly in northern European and Anglo-American cultures, and particularly for men — developed largely in the 17th through 20th centuries alongside the valorization of stoicism, self-control, and productivity as masculine virtues. The industrializing world needed a worker who could suppress, compartmentalize, and perform.

That suppression got embedded in institutions — schools, workplaces, military organizations, sports cultures — and transmitted generationally as the definition of strength.

The cost is not only individual. Communities with strong prohibitions against emotional expression tend to have: - Higher rates of violence (displaced unexpressed affect seeking outlet) - Higher rates of substance abuse (chemical suppression as substitute for emotional processing) - Higher cardiovascular disease rates (chronic sympathetic activation without parasympathetic resolution) - Lower social cohesion (emotional expression is the primary vehicle for human bonding)

These are not speculative connections. The research on emotional suppression's physiological effects — specifically the work of James Gross (Stanford) on expressive suppression as a maladaptive emotion regulation strategy — shows that suppression increases physiological arousal even as it decreases visible expression. You are not calmer because you don't show the tears. You are maintaining a higher arousal state with an added cognitive cost of active suppression.

Reclaiming tears as a biological tool doesn't mean all crying is equivalent or that more is always better.

Cathartic, completing crying has an arc: activation, peak, and resolution. After a cry that completes, there is usually a reduction in distress, a sense of release, and the capacity to return to function. This is healthy emotional processing.

Dysregulated crying can be a sign of overwhelm — when the emotional activation is occurring faster than the system can process. This can happen in severe depression, trauma flooding states, or highly dysregulated nervous systems. In these cases, crying does not produce relief but rather maintains or escalates distress. The arc doesn't complete. This kind of crying may require stabilization of the nervous system — through breath, grounding, co-regulation — before the processing can actually occur.

The presence of crying is not itself the measure. The completion of the arc is. Does the cry bring you back to baseline, or does it spiral? That distinction guides how to engage with the crying response.

For people who "can't cry": This is common and not a flaw. Several factors can suppress the tear response: antidepressants (particularly SSRIs, which reduce emotional intensity across the board), extensive conditioning around tear suppression, high dissociation, and physiological factors. If you want to restore access to the crying response, somatic work is often more effective than trying to cry harder. Relaxing the physical suppression — unclenching the jaw, softening the throat, allowing full breathing — often releases what's being held.

For people who cry too easily: If crying is happening in contexts where you don't want it, the response is not to suppress more aggressively (which increases physiological cost) but to build overall nervous system capacity — expanding the window of tolerance so that the activation threshold rises naturally as the system becomes more regulated.

For the culturally conditioned: Rebuilding permission to cry is a genuine process, not a switch. It often involves identifying the specific message you received ("crying is weakness," "crying is manipulation," "crying is unacceptable in this family") and consciously challenging it — not as affirmation but as ongoing behavioral experiment. Crying in safe contexts, gradually, and observing that the feared consequence doesn't materialize, builds new permission.

Suppressed emotion doesn't disappear. It expresses sideways: as anger, as physical pain, as control behavior, as the low-level hostility that characterizes so much of modern human interaction.

The world's addiction to stoicism — the collective decision that feeling things is weakness and not feeling them is strength — generates enormous hidden costs. Healthcare costs for stress-related illness. Violence from emotional pressure without sanctioned release. The slow erosion of the capacity for empathy that comes from spending decades not letting yourself feel.

Every person who learns to use the body's built-in stress-release mechanisms becomes, literally, less of a burden on others and on systems. Not because they become more compliant, but because they carry less undischarged stress into their interactions with the world.

And people who can feel — who have not armored themselves against their own interior — can feel others. That's not nothing. That's the basis for the compassion that the world actually runs on.

Tears are not weakness. They are the body working right. Let it work.