During the medical history for a blocked tear duct, the health professional will ask the parents of a baby with a possible blocked tear duct the following questions:

• Was there a problem during your baby's birth?
• Do your baby's eyes often look wet? Do tears often run down his or her face? When did you first notice these symptoms?
• Has your baby had any eye or sinus infections?
• Has your baby had any injuries or surgery on his or her face?
• Does your family have a history of blocked tear ducts?

The health professional will ask adults similar questions and may also ask the following:

• Have you been exposed to any strong chemicals or irritating substances (such as smoke or blowing dust) for a long period of time?
• Do you have a history of allergies?
• Have you noticed what seems to make your symptoms better or worse?