What causes eyes to be glued together?

* Blepharitis: This is a common condition that causes inflammation of the eyelids. It can be caused by a number of things, including bacteria, allergies, and certain skin conditions. Blepharitis can cause the eyelids to become red, swollen, and itchy. It can also cause the eyes to become watery and crusty.

* Conjunctivitis: This is an inflammation of the conjunctiva, which is the clear tissue that lines the eyelids and covers the white part of the eye. Conjunctivitis can be caused by a number of things, including bacteria, viruses, and allergies. It can cause the eyes to become red, swollen, and watery. It can also cause the eyes to feel gritty or sandy.

* Styes: These are small, red, and painful bumps that can form on the edge of the eyelid. Styes are caused by a bacterial infection of the oil glands in the eyelid. They can cause the eyes to become red, swollen, and watery.

* Chalazia: These are small, hard lumps that can form on the eyelid. Chalazia are caused by a blockage of the oil glands in the eyelid. They can cause the eyes to become red, swollen, and watery.

* Dry eye syndrome: This is a condition that occurs when the eyes do not produce enough tears. Dry eye syndrome can cause the eyes to become dry, irritated, and red. It can also cause the eyes to feel gritty or sandy.