A cooling sensation begins in the mouth
Sitali, a yogic breathing practice, draws air across the tongue before sending it into the lungs. The tongue’s damp surface can lose a little heat as moisture evaporates, much as wet skin feels cooler in moving air. Cooling-sensitive nerves in the mouth also register the incoming air, creating a distinct sensation of coolness.
That sensation is real, but it is not the same as quickly lowering the body’s internal temperature. The air is warmed as it travels through the airways, and the small patch of tissue exposed in the mouth cannot remove heat from the body as effectively as sweating over a large area of skin.
Why the practice can still feel useful
In a typical version, a person curls the sides of the tongue into a narrow channel, inhales gently through it, then exhales through the nose. Not everyone can curl their tongue; some versions instead draw air through pursed lips. The slow, deliberate rhythm can also encourage a pause in activity and steady breathing, which may make someone feel calmer while overheated.
Sitali is best understood as a traditional way to cultivate a cooling feeling, not a replacement for physical cooling in dangerous heat. Its memorable trick is local and immediate: a small stream of air can make the mouth feel cooler even while the body’s deeper heat changes little.
