Allergic conjunctivitis Allergic conjunctivitis Allergic conjunctivitis is inflammation of the conjunctiva (the membrane covering the white part of the eye) due to allergy. Although allergens differ among patients, the most common cause is hay fever. Symptoms consist of redness (mainly due to vasodilation of the peripheral small blood vessels), edema (swelling) of the conjunctiva, itching, and increased lacrimation (production of tears). If this is combined with rhinitis, the condition is termed allergic rhinoconjunctivitis. The symptoms are due to release of histamine and other active substances by mast cells, which stimulate dilation of blood vessels, irritate nerve endings, and increase secretion of tears.
The Rhinitis Revelation The Rhinitis Revelation "The Rhinitis Revelation" is the sixth episode of the fifth season of the US sitcom "The Big Bang Theory" and the 93rd episode of the show overall. It first aired on CBS on October 20, 2011. Sheldon's mother, Mary Cooper, is going on a Christian cruise called the "Born Again Boat Ride". Before the cruise, she has a weekend in Pasadena and visits Sheldon. However, he is upset when she does not do anything on his itinerary. Instead of his mother cooking chicken and making pecan pie, they go out to a restaurant for sushi; when doing