There are the following possibilities for bloodshot eyes: First, the most common is acute conjunctivitis, the symptoms of which include red eyes, foreign body sensation in the eyes, and more eye stools. You can order levofloxacin eye drops 3-5 times a day, ganciclovir eye drops 4 times a day, and apply levofloxacin eye gel at night before going to bed. Second, acute iridocyclitis, which has symptoms such as red eyes, eye pain and vision loss, requires atropine ophthalmic gel to dilate the pupil, flutriafolone eye drops to be ordered once every two hours, and tobramycin dexamethasone eye ointment to be applied before going to bed at night. The acute attack of acute angle-closure glaucoma, which is characterized by severe eye pain with ipsilateral migraine, significant eye congestion and red blood and sudden vision loss, requires immediate lowering of intraocular pressure, which can be treated with oral methazolamide tablets, dotted with maurozoline eye drops to narrow the pupil and open the atrial angle, dotted with carteolol eye drops to lower intraocular pressure, and if necessary, surgery.