Itchy, red and watery eyes are common symptoms of hayfever. A type of treatment called a mast cell stabiliser (e.g. sodium cromoglicate) can help to manage these symptoms.

The body's mast cells contain histamine and play a central role in many different allergies. As the name suggests, mast cell stabilisers work by stabilising mast cells, preventing them from releasing histamine and thus stopping allergic symptoms such as itchy, red and watery eyes from occurring. Some may cause side effects, such as a stinging or burning sensation in the eyes. Examples include Opticrom Allergy Eye Drops and Optrex Allergy Eye Drops.