Feb 2, 2023

Why are my eyes bloodshot

Answer

Bloodshot eyes are most commonly caused by harmless conditions that will resolve on their own even without treatment[1]. The most commonly seen causes of bloodshot eyes are allergies, eye fatigue, over-wearing contact lenses, common eye infections such as pink eye (conjunctivitis), or due to swimming, drinking alcohol, or wearing contact lenses[9]. When the eyes become red due to allergies, it is because the blood vessels in the front part of the eye dilate and become larger[1].

This causes the eyes to appear red from the increased blood flow to the area[7]. When suffering from fatigue or eye strain, it is important to take the time to rest and relax the eyes to help reduce the redness[8]. Pink eye often affects both eyes because the infection typically spreads from one eye to the other[5].

It is more commonly seen in children due to their close contact with others in school or daycare settings[7]. An eye injury or infection can also be the cause of a bloodshot eye, and it is important to visit a healthcare professional to rule out any underlying medical conditions[5]. In order to avoid bloodshot eyes due to alcohol or cannabis, it is important to avoid using these substances[1].

Additionally, it is important to practice good hygiene and to not share personal items with others in order to avoid contracting an eye infection[8].