Why would your eyes just randomly fill up with tears?

* Allergies: Allergies, such as hay fever or a reaction to certain foods, can cause your eyes to water excessively.

* Irritants: Smoke, dust, and other irritants can cause your eyes to tear up as a natural defense mechanism.

* Dry eyes: In some cases, dry eyes can also lead to excessive tearing as a reflex to try to keep the eyes lubricated.

* Emotional responses: Crying is a normal emotional response to sadness, joy, frustration, or other strong feelings.

* Medical conditions: Some underlying medical conditions, such as thyroid issues or Sjogren's syndrome, can cause watery eyes as a symptom.

* Clogged tear ducts: Blocked or obstructed tear ducts can prevent proper drainage of tears, causing them to overflow and result in watery eyes.

* Hormonal changes: Changes in hormone levels, such as during pregnancy, menstruation, or menopause, can affect tear production and cause watery eyes.

* Medications: Certain medications, such as antidepressants, birth control pills, or eye drops, can have side effects that include watery eyes.

If you experience persistent or excessive watery eyes, it's important to consult an eye doctor to determine the underlying cause and receive appropriate treatment.