It can trigger problems, such as conjunctivitis (pink eye) and
asthma. Generally, the signs and
symptoms include red, swollen, tearing or itchy
eyes; runny nose
; sneezing; coughing; difficulty breathing; itchy nose, mouth or throat, and headache from sinus congestion.
Many allergens are in the air (pollen, mold, dust and pet dander), where they come in contact with your eyes and nose. Other sources are certain foods, bee stings, cosmetics or drugs such as antibiotic eyedrops.