Why are my eyes bloodshot


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].


  1. https://www.verywellhealth.com/top-causes-of-red-eye-3422111
  2. https://www.webmd.com/eye-health/why-eyes-red
  3. https://www.mountsinai.org/health-library/symptoms/eye-redness
  4. https://www.aao.org/eye-health/tips-prevention/home-remedies-bloodshot-eyes-when-to-see-doctor
  5. https://www.medicalnewstoday.com/articles/316179
  6. https://www.goodrx.com/health-topic/eye/can-bloodshot-eyes-be-serious
  7. https://my.clevelandclinic.org/health/symptoms/17690-red-eye
  8. https://www.healthline.com/health/eye-redness
  9. https://www.allaboutvision.com/conditions/red-eyes.htm
  10. https://www.mayoclinic.org/symptoms/red-eye/basics/when-to-see-doctor/sym-20050748

Relevant Images

Below are images relevant to your question

why are my eyes bloodshot

why are my eyes bloodshot

why are my eyes bloodshot

why are my eyes bloodshot