Dry eyes, eyelid infections and inflammations, eyelid malpositions, and corneal diseases can cause overproduction of eye fluid, or tearing. Dry eye is a common cause of tearing and many different treatments exist, including tear replacement and closure of the punctum, the tear drainage opening. Eyelid malposition, such as inward or outward turning of the eyelid, can also cause tearing, as can eyelid laxity. Blockage of the tear drainage pathway can cause tearing. At times, the punctum is closed; at other times, the closure may be in the nasolacrimal duct, which can occur in children and adults. Sometimes conservative treatment can clear the problem while in other cases surgery may be required.