Cause: Allergic Conjunctivitis
Allergic conjunctivitis can be a common cause of epiphora, which is the excessive tearing of the eyes. This condition occurs when allergens, such as pollen or animal dander, come into contact with the eye or enter the body. When these allergens are present, the eyes may become sore and inflamed.
In response to the allergens, the body releases histamine through mast cells. Histamine causes the blood vessels in the eyes to dilate, leading to irritation of the nerve endings and resulting in redness and excessive tear production. The immune system also tends to overreact to allergens, leading to the excessive watering of the eyes as a way to flush out the substances.
Furthermore, hay fever or allergic rhinitis can also contribute to the development of seasonal epiphora. This condition is characterized by an allergic reaction to airborne allergens, typically occurring during specific times of the year.
Cause: Corneal or Eye Surface Damage
Damage to the cornea or surface of the eye can lead to a condition known as epiphora. This condition occurs when the eye reacts to the injury by producing excessive tears. Corneal abrasions, which can be caused by foreign objects coming into contact with the eye or by excessive scratching or rubbing, are a common cause of this type of damage. Symptoms of corneal abrasions include feelings of grittiness, soreness, and excessive tearing. The irritation of the cornea prompts the eye to produce more tears as a protective mechanism.