Many people notice their eyes become moist or tear up naturally every time they yawn. This is a common occurrence and typically not a sign of a medical condition.

According to the Cleveland Clinic, yawning involves more than just opening the mouth; it also activates numerous muscle groups in the facial region, including those around the eyes. This muscle contraction can temporarily compress the tear drainage system, slowing the flow of tears into the nasal cavity.

Normally, tear glands constantly produce a small amount of tears to keep the eye surface moist and protected. These tears then drain through small openings at the inner corner of the eyes, flowing down the tear ducts into the nasal cavity. When this drainage is obstructed during a yawn, tears continue to be produced but cannot exit into the nose quickly enough, causing them to spill over and make the eyes watery or tear up.

Healthline states that this phenomenon is short-lived. The extent of tearing during a yawn varies among individuals, depending on the volume of tears produced, the efficiency of the tear drainage system, the degree of muscle contraction around the eyes, and the condition of the eyeball's surface.

Yawning can cause tears to flow naturally. Photo: Bao Bao

Individuals with dry eyes may experience more tearing when yawning. This occurs because dry eyes stimulate the body to produce more tears reflexively to compensate for the lack of moisture. When tear drainage is temporarily hindered during a yawn, this excess fluid is more likely to overflow. Conversely, for those with an efficient drainage system, tears still flow into the nasal cavity, making the phenomenon minimal or almost unnoticeable.

Yawning is a natural reflex, and tearing during a yawn is a normal physiological response. If tears appear only when yawning and quickly subside, there is no need for treatment or excessive concern. However, if eyes frequently water even without yawning, or if the condition persists, the cause may be more than a simple physiological reaction.

You should consult an eye specialist if prolonged tearing occurs or if it is accompanied by symptoms such as red eyes, eye pain, swollen eyelids, excessive discharge or unusual fluid, blurred vision, or continuous tearing that impacts daily activities.

These symptoms may indicate issues such as blocked tear ducts, conjunctivitis, allergies, or other eye conditions. Patients should seek medical examination to determine the cause and receive appropriate treatment.

Bao Bao (Compiled)