Stinging and tearing of the eyes in the middle of the night may be due to inflammation of the eye area, and there is often redness, swelling and pain in the eye and surrounding area. There may also be a foreign body in the eye, or a proptosis or poor eyelid closure due to other diseases, and the cornea may become dry in the middle of the night after prolonged exposure to the air, and may also feel a sudden stinging pain. In any case it is still advisable to go to the hospital and combine the person’s other symptoms and relevant tests to clearly diagnose the cause of the condition.