Allergic conjunctivitis treatment. Conjunctivitis can occur as a result of an allergic reaction, usually to pollen or animals, which causes your body to release histamines in the lining of your eyes resulting in pink eye. This type of conjunctivitis commonly causes pretty serious itching and puffiness in eyes, accompanied with consistent sneezing and some tedious watery nasal discharge. Generally, allergic conjunctivitis is fairly easily treated. It can be relieved with eye drops which will control the itchiness and puffiness.