13 doctors weighed in:
Why do allergies make my eyes water?
13 doctors weighed in

Dr. Sean McGhee
Internal Medicine - Allergy & Immunology
9 doctors agree
In brief: Immune reactions
The conjunctiva, the thin membrane on the inner surface of the eyelids and the white part of the eye, has lots of mast cells, which are the cells that react to allergens.
So just as you get an allergic reaction in the nose, you get an allergic reaction in the eye as well. The eye is also connected to the nose through a small duct, and sometimes allergens can travel back and forth.

In brief: Immune reactions
The conjunctiva, the thin membrane on the inner surface of the eyelids and the white part of the eye, has lots of mast cells, which are the cells that react to allergens.
So just as you get an allergic reaction in the nose, you get an allergic reaction in the eye as well. The eye is also connected to the nose through a small duct, and sometimes allergens can travel back and forth.
Dr. Sean McGhee
Dr. Sean McGhee
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Dr. Paul Carter
Internal Medicine - Allergy & Immunology
3 doctors agree
In brief: Histamine
Histamine acts directly on the eye to cause redness, swelling, itching, and tearing.
There is also an effect through histamine causing nasal symptoms like itching which in turn can cause tearing in the eye through the naso-ocular reflex.

In brief: Histamine
Histamine acts directly on the eye to cause redness, swelling, itching, and tearing.
There is also an effect through histamine causing nasal symptoms like itching which in turn can cause tearing in the eye through the naso-ocular reflex.
Dr. Paul Carter
Dr. Paul Carter
Thank
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