Okay, im 15 years old. My left eye is completely bloodshot, it's so purple it's almost black. I can only open it halfway. My other eye is not as red, but very pink and there is bruising around it. Could this be side effects of an STD? I haven't talked to my parents about it yet, because im scared. I researched and a website said it could be a side effect or infection caused by Chlamydia or Gonorrhea. I am waiting to tell my parent's until i've got a good idea of what it is. Can you please reply? I need help.