Old tears in the eyes may be caused by environmental stimulation, eye lesion stimulation, tear duct obstruction and other factors.
1. Environmental stimulation: When the eyes are subjected to physical stimulation for a long time, such as high wind, bright light, smoke and fumes, it will lead to an increase in tear secretion and frequent tearing.
2. Eye disease stimulation: eye tissue is stimulated by inflammation, there may be an increase in tear secretion, tearing eyes, common diseases such as conjunctivitis, keratitis, etc.; inverted eyelashes and other eye diseases can also trigger excessive tear secretion.
3. Tear duct obstruction: the presence of nasolacrimal duct stenosis or blockage, etc., tears can not flow smoothly into the nasal cavity, the symptoms of old tears in the eyes will occur.
There are many factors that can cause tearing of the eyes, so it is recommended that patients consult a doctor in time to find out the cause of the problem.