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Aug 5, 2024 ... There are many causes of a red eye or eyes. Some are medical emergencies. Others are a cause for concern, but not an emergency. Red eye is caused by light reflecting off the retina at the back of your eyes. Generally, it happens in low light conditions when a flash is used. This redness is most often caused by rupture of a blood vessel (haemorrhage), an inflammatory reaction, or dilation of a blood vessel in the eye, but it can ... Conjunctivitis: This is a highly contagious viral or bacterial infection of the eye that is often found in children, child care centers, and pre-schools. Apart ... Bloodshot eyes happen when the blood vessels in your eye become more noticeable, larger or inflamed. Your eyes might not feel any different. Sep 10, 2024 ... What Causes Bloodshot Eyes? Red eyes generally occur when the tiny blood vessels in your eyes expand and become more visible. All sorts of ... Sep 30, 2023 ... Bloodshot eyes typically appear red due to the dilation of tiny blood vessels in the whites of the eyes. Oct 22, 2019 ... Possible causes of eye redness · Allergies: If you have allergies, your eyes may also see the difference with changing seasons. · Broken blood ... Why are my eyes red? Eye redness usually refers to when the white part of the eye (the sclera) appears reddened or "bloodshot." It may occur when blood vessels ... Jan 16, 2020 ... Allergies are the primary cause of red eyes. The body reacts to an allergen—pollen, pet dander, mold, dust—by releasing histamines. Histamines ...