Persistent pinkeye could be from a severe allergy or infection that needs treatment. Also, the eyelid could be irritated called blepharitis. Hay fever is caused by an allergy to pollen.Pollen is the name given to the fine powder that is produced by plants, trees or flowers to fertilise other plants, trees or flowers of the same species Likely your child have Allergic pinkeye symptoms, that should improve once the allergen source is removed and the allergy itself is treated. Cold compresses or warm compresses (whichever feels best) can be used. If an allergy is the problem, a cool compress may feel better.Warm, moist compresses can spread infection from one eye to the other. Use a different compress for each eye, and use a clean compress for each application. Avoid the cause of the allergy, if possible. For example, if you have seasonal conjunctivitis then during the hay fever season try to avoid pollen by staying indoors as much as possible. Close windows and by wear wrap-around sunglasses when out. For pinkeye related to allergies, antihistamines, such as loratadine (Claritin) or cetirizine (Zyrtec), may help relieve your child s symptoms. Don t give antihistamines to your child unless you ve checked with the doctor first. MEDICINES: Antihistamine nasal spray. Antihistamine tablets (or liquid medicines). Steroid nasal sprays and drops. Antihistamine eye drops work quickly. Mast cell stabilisers are another type of eye drop.