Can you faint because of your knees.?

You could have possibly tore something in your knee and you really should see a doctor about it and yes pain in your knee can cause you to blackout because your knee is probably locked

Some people are more prone to fainting than others, and you seem to be one of them. As I, and other people have told you, it is possible to faint from pain. However you seem to faint from light exercise as well, so that could point to anaemia. Anyway, let me see if I have got this straight -- you have a very painful knee, unexplained bruises on your knee, you faint when you have knee pain or exercise and you want help, but refuse to go to the doctor and do not want any tests done? What do you want us to do for you? You have posted this question with slight variations 12 times and had lots of advice, but do not want to take it. We cannot do anything over the internet but advise you. You need to be properly examined and get an accurate diagnosis. Going to the doctor is the only thing that can help you. What do your parents think about it all, and what do they advise when you are fainting all the time? . Whatever is wrong with your knee needs to be diagnosed and then you should be ok. There is nothing to be scared about going to the doctors, they are there to help you and will not hurt you. Good luck