Red, swollen eyes and eye boogers can be caused by conjunctivitis, keratitis, acute blepharitis and other causes. 1. Conjunctivitis: it is the most common cause, usually caused by swimming in pools or ponds with unclean water quality and rubbing the eyes with dirty hands, etc. It can be treated with antibiotic eye drops, such as ofloxacin eye drops and tobramycin eye drops. 2. Keratitis: the cornea is scratched due to trauma to the eye, the defense barrier function is reduced, triggering infection, also need to use antibiotic eye drops treatment. 3. Blepharitis: It is caused by the excessive secretion of the blepharoplasty glands, as well as poor hygiene and other reasons that lead to infections, and can be treated with antibiotic eye ointment, such as erythromycin ophthalmic ointment, lomefloxacin ophthalmic ointment, and so on. Patients should go to the ophthalmology department of the hospital for an interview and examination to clarify the cause of the disease, and under the guidance of the doctor for treatment.