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Some dogs react badly to common allergens and this can cause their eyes to become red and bloodshot. This is very common in dogs with large eyes that are ... Seasonal or environmental allergies, such as those to pollen, pet dander, and cigarette smoke, can cause red and swollen eyes. You may also experience itching, ... Jan 4, 2022 ... Dry eyes can occur when you're unable to produce enough tears. The medical term for this condition is keratoconjunctivitis sicca. Common causes ... Colds and other viral infections don't just cause sneezing and coughing but they may also affect your eyes. If your eyes are red, uncomfortable, and won't stop ... Red, bloodshot eyes can indicate several conditions. They may look alarming, but they're usually caused by a minor eye irritation or condition, like ... Jun 21, 2023 ... Excessive alcohol consumption can cause a subconjunctival hemorrhage. This is when the tiny blood vessels in the eye burst and bleed into the ... Apr 28, 2020 ... The causes of eyes turning red are most likely due to minor problems, such as burst blood vessels or conjunctivitis. In these cases, the ... Red eye. A red eye is usually nothing to worry about and often gets better on its own. But sometimes it can be serious and you'll need to get medical help. Mar 12, 2018 ... Extra blood is necessary to counter inflammation because blood carries white blood cells meant to fight inflammation. Some reasons for ... Jul 9, 2019 ... Red veins in babies' eyes: what causes it? Your newborn baby might have red veins in their eyes from a subconjunctival hemorrhage (see above).