What is the worst knee injury?

There have been a lot of people who have problems with their knee. It could be due to old age or a sports injury or due to a fall, leading to a ligament tear, arthritis and so on. I really can’t tell you which one is the worst. Each problem would be challenging in its own way. The ACL (anterior cruciate ligament) is a pair of ligament in the centre of the knee. When the ACL tears it causes the blood vessel inside also to rupture, causing swelling. This should be examined and treated with accuracy. Generally any knee pain should not be neglected.

Hi Deergha... Knee injury is worst when you cant walk with unbearable pain. Its really not possible to tell you that which condition is the worst one for knee joint. Knee injuries varies from ligament tear, knee muscle injuries, joint injury,etc.

I completely severed my left patella tendon, got undercut going for a layup. I had no idea I was even injured until I tried to get up and my leg wouldn't move. I looked down and my knee cap was in my thigh and the muscle was laying flat like I had a paralyzed leg. The tendon was severed right below the kneee cap and the knee cap detached from the tendon and the tendon then detached from my bone. Ouch... fortunately the nerve endings were so damaged I didn't even know I was hurt until I tried to move it and then it hit the fan. The rehab was brutal, four months on crutches and I had NO control over my leg. I could feel it but couldn't move it. I had to relearn to walk by swinging my hip to make my leg go forward until my brain and leg learned to communicate again. I was told I would never run again and if I was lucky I would be able to do a light jog. Ten years later I am happy to say I am running, yes running. I have done several 5k and 10k races and even managed a full marathon in 5 hrs. I have only been able to jump off that leg once, a month ago and it scares me to even try but I did it without thinking. Severed tendons suck, hope you never have to deal with one.