It is normal for tears to flow when yawning because when yawning, the pressure in the lacrimal duct increases and the drainage of tears is blocked, leading to tear reflux and causing tears. Tears are produced by the lacrimal gland, which produces tears and then discharges them through the lacrimal system, first to the conjunctival sac, and then through the upper and lower tear ducts to the lacrimal ducts, the common lacrimal duct, the nasolacrimal duct, and finally to the nasal cavity. When yawning, facial muscles are in a state of tension, including the eye muscles, resulting in an instantaneous increase in the pressure in the lacrimal duct, the common tear duct, the nasolacrimal duct, the tear discharge is impeded, reflux to the conjunctival sac, which leads to tears out of the eye. Yawning tears is a normal phenomenon, do not worry too much, and do not need special treatment. It is recommended that patients with frequent tearing should consult a doctor to evaluate their condition and follow the doctor’s instructions for treatment.