Histamine is the substance responsible for triggering allergy symptoms in the eyes, nose, and skin. Antihistamine eye drops are generally safe to use with both hard and soft contact lenses. It is ...

For example, in the: mouth which includes the tongue, palate, gums and lips throat (the pharynx) which is divided into the nasopharynx, oropharynx and hypopharynx nose and sinuses (air-filled spaces ...