Tears come out when you cry because your brain sends a signal through a specific nerve pathway to small glands above your eyes, telling them to flood the surface of your eye with fluid. During emotional crying, these glands produce so much fluid that your normal drainage system can’t keep up, and the excess spills over your eyelids and down your cheeks.
How Tears Are Made and Where They Go
Your lacrimal glands sit in the upper outside corners of each eye. They continuously produce a small amount of fluid that gets spread across your eye every time you blink. An oily layer from glands along your eyelid margins mixes with this fluid to form your tear film, which keeps the surface of your eye moist, nourished, and protected.
Under normal conditions, you never notice this process because the fluid drains away as fast as it’s produced. Each of your upper and lower eyelids has a tiny opening called a punctum near the inner corner of your eye, close to your nose. Every blink acts like a pump, pushing used tears into these openings. From there, the fluid collects in small sacs and flows down through your tear ducts, which empty into the back of your nose. That drainage pathway is why strong crying gives you a runny nose and makes you want to sniffle: excess tears are literally pouring into your nasal cavity.
What Happens in Your Brain During Emotional Crying
The signal to produce tears doesn’t come directly from your emotions. It passes through a specific relay station in your brainstem called the lacrimal nucleus. This nucleus collects input from multiple sources, including emotional centers in the brain, and generates a graded output. In other words, it decides how much tear fluid to produce based on how intense the combined signals are.
The command travels from the brainstem through a parasympathetic nerve pathway that runs alongside your facial nerve. This chain of nerves passes through several relay points before reaching the lacrimal gland itself, where it triggers the gland’s secretory cells to release fluid. The process isn’t a simple on-off switch. It’s a scaled response, which is why a slight wave of sadness might make your eyes glisten while deep grief can produce a steady stream of tears your drainage system simply can’t handle.
Three Types of Tears, One Gland
Your lacrimal glands produce three functionally different kinds of tears. Basal tears are the steady, low-volume tears that keep your cornea lubricated throughout the day. Reflex tears flood your eyes in response to irritants like onion vapors, dust, or bright light. Emotional tears are triggered by feelings: sadness, joy, frustration, relief, even laughter.
All three types come from the same gland, but they’re triggered by different neural inputs converging on the lacrimal nucleus. Reflex tears are driven by sensory nerves on the surface of your eye detecting irritation. Emotional tears originate from signals in the brain’s emotional processing areas. The lacrimal nucleus integrates both, which is why emotional crying can feel physically similar to tearing up from wind or smoke, even though the cause is completely different.
Why Crying Gives You a Lump in Your Throat
The same branch of your autonomic nervous system that triggers tears also affects the muscles in your throat. When you’re fighting back tears, your body is caught between two competing systems. The sympathetic nervous system (your fight-or-flight response) tenses the muscles of your larynx and pharynx, opening your airway to let in more oxygen. Meanwhile, you’re still trying to swallow and breathe normally. That conflict between an open, tense throat and the normal swallowing motion creates the tight, stuck sensation often described as a lump in the throat. The sensation is harmless and fades once the emotional moment passes or you stop trying to suppress the cry.
Why Crying Eventually Makes You Feel Better
The relief many people feel after a good cry isn’t just psychological. Crying activates your parasympathetic nervous system, which is the counterpart to fight-or-flight. As this system kicks in, your breathing slows, your heart rate drops, and the physical stress response begins to wind down. The effect isn’t instant. It typically takes several minutes of crying and deep breathing before your body shifts into this calmer state, which is why a brief cry that gets interrupted can leave you feeling worse rather than better.
This self-soothing mechanism helps explain why crying often feels like a release. Your body escalates into a high-arousal emotional state, tears flow as part of that peak, and then the parasympathetic system pulls you back toward balance. Symptoms of stress like a tight stomach or restlessness can ease after a few minutes of sustained crying.
Hormones Influence How Easily You Cry
Not everyone cries with the same frequency, and biology plays a significant role. Women report crying emotional tears 30 to 64 times per year on average, compared with 5 to 17 times per year for men, based on self-reports from more than 7,000 people across 37 countries. Part of this gap is cultural, but hormones contribute too.
Prolactin, a hormone found at higher levels in women and in new parents of both sexes, appears to lower the threshold for emotional tearing. Studies on new fathers found that those with higher prolactin levels were more emotionally responsive to infant cries. Testosterone seems to work in the opposite direction: fathers and non-fathers with lower testosterone levels reported greater sympathy and a stronger urge to respond to a crying baby. These hormonal influences don’t determine whether someone can cry, but they shift the point at which the brain’s emotional signals are strong enough to trigger the lacrimal glands.
Tears as a Social Signal
Humans are the only species known to shed emotional tears, and the leading explanation is that visible tears evolved as a social signal. Tears on your face are hard to fake and impossible to miss. They communicate distress in a way that’s more immediate than words, prompting nearby people to offer help, comfort, or at least reduce aggression. Research suggests that this signaling function is the primary evolutionary driver behind emotional tearing, not any chemical relief from the tears themselves.
This framework fits neatly with cultural practices across societies. Ritual weeping, found in many traditions, often accompanies requests for help from a powerful figure or deity and strengthens social bonds within a group. Whether you’re crying at a funeral or tearing up during a reunion, the visible tears serve the same core purpose: they tell the people around you that something emotionally significant is happening and invite connection.