Tears Contain Natural Painkillers

Not all tears are created equal; the tears that stream down your face during a sad movie are biochemically different from the ones that well up when you chop an onion. Humans produce three types of tears: basal tears that provide constant lubrication, reflex tears that flush out irritants, and emotional tears. Scientific analysis reveals that emotional tears, triggered by feelings like sadness, joy, or stress, possess a unique chemical signature. They carry higher concentrations of protein-based hormones, including prolactin and adrenocorticotropic hormone, which are linked to stress.

The most fascinating component of emotional tears is a substance called leucine enkephalin, an endogenous opioid peptide that functions as a natural painkiller. Discovered in 1975, this neuropeptide is involved in regulating pain and managing stress within the body. Its presence in emotional tears supports the long-held belief that a good cry can be a cathartic experience. The release of these stress hormones and natural analgesics is thought to be the body's way of physically purging emotional tension and restoring a sense of balance, which helps explain the feeling of relief that often follows a bout of crying.