Red, swollen, itchy eyes with a lot of eye stool are most likely caused by a bacterial infection. This kind of bacterial infection is mainly caused by yellow, pus-like eye stool, especially in the morning when there is a lot of eye stool, which often blurs the eyelids and makes it difficult to open the eyes, and during the day there is also a lot of eye stool flowing out and sticking to the eyelashes. In this case, antibacterial eye drops, such as levofloxacin or tobramycin drops, should be used. In addition, if there is less yellow eye drops and more white or watery eye drops, and the itching is more severe and the congestion is less severe, the condition may also be allergic and requires the use of anti-allergy eye drops, such as Olopatadine eye drops to relieve the symptoms.