First I fell at work almost 2 years ago... the area just under my knees was on fire...a day later I noticed bruising above my knee...I had a hard time bending over and could not crawl on my knees... several months later a trip to our lake house my legs went into tremors as I was going down the stairs...no problem going up...we go to the movies often and I have to have help while starting to walk after sitting... the pain is all over my knee area... mostly to the insides of both knees. I cannot sit with my legs curled to my side...or crossed ...best position is in the recliner with them straight...I have no pain while sleeping or when waking up...just recently started having a shooting pain across the top of the knee cap...and to the inside...what is the problem... none of this was going on prior to the fall.