Bit of a story - over 7 years ago I had two athroscopies done on my knee for removal of 'plica' and half the fat pad was removed as it was snaring in the knee joint and constantly inflamed. Since then, I've not really been able to kneel on that knee and have had bouts of what the doctor calls 'viral arthritis' where I have to go on steroids (last bout of this was about a year ago) Just recently I get a really strange sensation that the joint is out of place and a sensation which I can only term as my knee changing gear (!) When this happens my athroscopy scars become very raised and pronounced. This morning I lent forward to empty the washing machine and had the most excruciating pain in my knee. Currently raised it and icing it. Do I need to see doc or is it just some sort of muscle ache.