Increased tears are usually caused by the following reasons: first, it is caused by the obstruction of the tear duct, the tear duct is located in the inner corner of the eye, the main function is to discharge the tears secreted by the eye into the nasal cavity, absorbed by the nasal mucosa, once due to trauma, inflammation and other reasons, resulting in the blockage of the tear duct, tears will accumulate in the eyes, thus forming the performance of tears; second, it is caused by chronic lacrimal gland inflammation, the early stage of chronic lacrimal gland inflammation In the early stages of chronic lacrimal glanditis, the gland is stimulated, which leads to a large amount of tear secretion, resulting in more tears, but when the inflammation progresses to an advanced stage, the tear gland is heavily damaged, which will cause a decrease in tears; thirdly, it is caused by damage to the corneal epithelium, resulting in irritating tears, such as keratitis, corneal scratches, electrophthalmia, etc. At the same time as tears, there will be tingling, foreign body sensation, photophobia and other symptoms of the eye. Symptoms.