Tears while yawning are usually caused by the contraction of the eye muscles during yawning. Tears when yawning is a very common phenomenon, most patients are due to yawning when the orbicularis oculi muscle contraction, the patient unconsciously close their eyes, at the same time caused by the muscle spasm around the tear duct, the tear duct temporary drainage is not smooth and caused by the physiological phenomenon, do not need treatment. Yawning eye muscle contraction, may also directly stimulate the secretion of the lacrimal gland, resulting in increased tears, causing tears, which is also a physiological phenomenon, without special treatment. Yawning tears are normal phenomenon, if accompanied by other eye discomfort, it is recommended to consult a doctor for examination and treatment.