Bugs fly into the eye inside the symptoms of redness, swelling and pain how long can be eliminated there is no fixed period of time, and the severity of the disease has to do with, often due to allergies, infections and other reasons. 1. Allergy: bugs into the eyes because of allergic reactions caused by redness, swelling and pain, and then a lot of water to remove allergens, and point anti-allergy eye drops, such as orotidine hydrochloride eye drops, azelastine hydrochloride eye drops and other treatments, the majority of patients about 2 to 3 days, the symptoms can be significantly relieved. 2. Infection: for the bugs into the eyes caused by infection caused by redness, swelling and pain, you need to use anti-infection eye drops for treatment, such as ofloxacin eye drops, moxifloxacin eye drops, etc., the improvement is relatively slower, usually takes about 1 week. You should go to the hospital in time and under the guidance of the doctor, do not use drugs privately, which may cause danger.