Blockage of the lid glands most commonly causes dry eyes. This is because the lid glands produce an oily secretion that plays a very important role in the stability of the tear film. If the lid gland is blocked, the quality of the tear film decreases and the time spent on the surface of the eye is reduced. If this condition is prolonged, it can easily cause dry eyes and lead to dryness and soreness of the eye surface. If the opening of the lid gland is blocked, it may also cause a cyst of the lid gland. The blockage of the opening can cause secretions to accumulate in the ducts and form cysts. Cysts can sometimes be aesthetically displeasing and can cause a grinding sensation in the eyes, and usually require surgery to remove them if they are large. If there is an obstruction in the opening of the lid gland, first you can apply hot compresses or go to the hospital for lid gland massage, which can help with the obstruction.