Tears have the following possibilities: 1, increased secretion of tears and personal constitution has a relationship, some people are more sensitive to the conjunctiva, a little stimulation or excessive fatigue, tears will increase secretion, which is normal; 2, inflammatory increase in tears, such as corneal damage, conjunctival inflammation, or into the foreign body will stimulate the increase in tears caused by the secretion of tears, after the disappearance of the cause of the disease, the secretion of tears will gradually become normal; 3, because of the blockage of narrow lacrimal canal leading to the tears out of the pipeline is not smooth, the tears are collected in the conjunctival sac, thus leading to the tears of tears increase in secretion caused by the tears, which belongs to the lacrimal system diseases need to be symptomatic treatment.