Why did my kneecap just fall out?
967212
you must have kneeled on it wrong so it got angry and left.
785523
it has nothing to do with being a couch potatoe. My knees do that and so do my moms and we are active people. \n\nThis website says something about it, i havent read it yet though. see if it helps.\n\nhttp://sportsmedicine.about.com/cs/injuries/a/aa092500.htm
337614
You can't.  What you can do is make the muscle around the knee stronger giving it support.
736760
I have had the same thing happen with my right knee. When the weather changes to cold or if it's going to rain it just aches.\nSome simple easy things you can do to help.\nPurchase one of those cheap ace bandage knee supports. This will help to hold everything in place and aid your ligaments from the stress. Buy or make your own ankle weights. The little sandbag type, depending on your physique start from 2-5 lbs. Sit on a surface that is high enough to allow your legs to dangle, and just raise your legs from 90 degree angle to 180 degrees start off with 2 sets of 10 and work your way up. This will strengthen muscles around your knee. When you lay down to relax you can apply alternating daily hot and cold packs while laying with your legs elevated above your heart simple as using the pillow for your leg instead of your head. This will increase circulation and reduce swelling.
261132
I have the same issue:\n\nWhat exercises are the cause of the problem?  If it's running, than walk on the treadmill... up a steep hill.\n\nEven though your knee now hurts, some exercises might not.  For me, the eliptical machine and stationary bike don't hurt.\n\nRemember, when doing leg exercises, you don't want to straighten your knee at any time.  With leg presses, make sure your knee is always slightly bent.  In this way you are  using your larger thigh and calf muscles, and alleviating the strain on your knee.\n\ndon't run!
959189
I am 41, I started to have problems with my knees after my son was born (37). I went to the Doctor for the same problem. He stated in a healthy knee, your knee cap will glide seamlessly across the joint, you have a grove in the center and when your muscular structure begins to  weakening the knee caps will dig new groves. This causes the crunchy, grinding sounds. He suggested to do isometric exercises to improve muscular strength and get it back on track. Hope this helps before you end up in pain as I was when I went to my doctor.
626775
It could be a compression bruise, like landing too hard on that leg and pushing the bones together and squashing the soft tissue. Probably the best thing would be to apply moist heat to it 2-3 times a day. Keep it elevated as much as possible to avoid fluid build up. Also a hot patch like the ones made by IcyHot or Bengay might help reduce the swelling in the knee. Damage to any joint can cause fluid build up. That is what causes swelling. Swelling can occur as an obvious bulging or it can be within the soft tissue in the joint ans not be noticeable to the eye.Keep your leg rested as much as possible but you will need to use it some each day to keep it from stiffening up. Good luck!\n\nSincerely,\nTerry
242734
Had one like that. Might be a subluxation (type of dislocation). You should go to the emergency room and have it checked out. If it is a dislocation, it must be reduced and have some type of physical therapy to strengthen it or you will have problems.\n\nI said emergency room because you should not wait. Dislocation is a time critical injury and waiting can mean surgery.
91020
I assume you're saying that your total knee replacement has failed. If so, I guess they can take out the old one and replace it with another total knee replacement.
563880
You definitely should talk to your coach and unless it's obvious to him/her go and see a doctor - I developed knee pain from playing Volleyball and it turns out I have a common knee condition which am now being treated for; having gone to my doctor and then referred to a sport's injury specialist.  It is obviously worrying you and it's always better to catch injuries/conditions early on so definitely talk to your coach at your next session.
226933
Its the most common cause of cronic knee pain, it happens when the patella (knee cap) isnt aligned correctly and it slides over the lower end of the femur. It can be treated by working on the inner portion of the quadriceps muscle to help normalize the tracking of the patella
1082853
Yes, I've heard of situations like that...The bruises are from that dang knee cap sliding. It's moving around, causing bruises that start from the inside and work their way out. I don't think that normally bruises start from the inside out unless you have a problem like yours, though.
1140252
I fell and landed with the inside of my knee on the floor. Kind of a contortionist landing and not much pain except for the impact. I forgot about it.\nTwo years later I started using the treadmill and my knee began to hurt. An MRI showed that when I fell, I had torn the medial miniscus (the cushion between tibia and femur-on the inner part of knee) The miniscus doesnt have nerve endings so I didnt feel pain from the tear when I fell. Nor does the miniscus heal.(At the time of the MRI report, I couldnt remember ever hurting my knee, until I thought back). \nI went through physical therapy which alleviated most of the pain and lessened the occurences of pain. The part of it that tore away, floats around and occasionally causes pain.  I reinjured the same knee and had more PT but now, it will hurt at the end of the day usually if at all, if I use the stairs a lot that day, bicycle etc.\nPoint is, you could have done something to injure it and passed it off. \nHave it checked out with diagnosic tests, xray, MRI etc. If you get regular xrays make sure that it is light enough to see soft tissue as well as dark enough to see bone. (Just tell the tech youre an xray tech and they'll be glad to oblige your request to show the soft tissue, and cross table lateral)o/w theres a lot of ego in that job and requests from patients arent taken well.Theres a sign on the lateral knee view that can, if taken properly, show a sign of trauma. The lateral knee xray should also be taken "cross table" to show any fluid level indicating trauma.\nI'm not diagnosing. Just my experience. I'm sure you've been careful to stretch before and after running. Running is very hard on the knees anyway.
167205
I think probably when you hit the knee it caused a blood clot to form under the skin which is common in bruising,and that swelled into 2 pea size lumps.Try taking some extra vitamin C,and if the swelling doesnt go down within a few days you can have it evaluated by a physcician.
181127
Go to a doctor immediately.  I had something similar happen to me as a teen.  What I didn't know is I tore a tendon right off the bone.  My other tendons compensated and over the years started snapping off one by one.  Each time I'd be in horrible pain and couldn't walk right for a few weeks.  In my 30's my wife finally got sick of me complaining so she made me go to the doctor.  One MRI later and we found all I had left was one tendon.  The large one in front.  They had to cut me open.  They sliced the strips from the big tendon and reattached them to my knee.  Two months of painful physical therapy later and my leg won't straighten the whole way.\nThe plus side is I don't occasionally fall without warning.\nLet this be a cautionary tale.  Get to a doctor.  Better safe than sorry.
1039066
I have worked one many with this type of fracture. You can get back but you will need to work hard. But this type of fracture is part of the joint . Your knee may always be weak and have some pain. I wish you luck
487716
So WHAT exactly got stiff?  Did your BACK get stiff?  Did your KNEE get stiff.  Dontcha just hate it when that happens!  You are a moron... moron's don't deserve REAL answers.