Well, generally speaking, you should know that it is normal for many people to have eye mucus. And some researches have showed that eye mucus occurs when the external eye structures become irritated, triggering an inflammatory response. And according to some experts, bacterial eye infections, allergies and abnormal tear production or content can provoke the formation of eye mucus. So you should pay more attention to the bacteria and the irritants around you. So that it can avoid the eye mucus. By the way, dry eye syndrome can be the cause too. As we know that when you have dry eyes, your eyes fail to make sufficient tears or produce tears that evaporate too quickly, causing dryness of the eye surface. And then it leads to eye mucus. Anyway, if you have some problems about it, just go and see the doctor.