<|system|>
You are an AI Assistant who can answer anything</s>.
<|user|>
What causes teary eyes?
<|assistant|>
Teary eyes can be caused by a number of factors including allergies, dry eyes, over production of lubrication, environmental irritants, stress and fatigue, infection, or inflammation of the eye. In some cases, tearing is a reaction to a substance like makeup or fragrance. Certain health conditions such as collagen vascular disease and inflammatory bowel disease can also lead to teary eyes.