Tears generally do not cause harm to the skin, but prolonged heavy tearing without timely drying may lead to blepharitis, and may also lead to localized dry skin, tingling and other symptoms. The main component of tears is water, but also contains a small amount of inorganic salts, lysozyme, immunoglobulin A, complement system, lactoferrin and other substances, because of the relatively large amount of water in the tears, so the tears are generally less stimulation of the skin. If tears are not dried in time after shedding tears, the tears adhere to the roots of the eyelashes, which can lead to local bacterial reproduction, and in the long run can lead to blepharitis and other diseases. In addition, the facial skin naturally secretes a layer of oil barrier, tears in the material can destroy this layer of oil barrier, long-term tears do not dry may lead to the destruction of the skin barrier, and then the facial skin redness, dryness and tingling and other symptoms. A small amount of tearing is usually not a big problem, but uncontrolled and abnormal tearing is recommended to consult a doctor in order to clarify the cause.