I am having difficulty fully extending my knee. Additionally, there is a tightness in the back of my knee. I ve had both knees scoped due to torn meniscus (tennis injuries). Although the not being able to extend the knee feels like the meniscus injury, there is no real pain in that half moon area below the knee cap. I am experiencing kind of a general pain all over the knee area. There is a slight bit of swelling as well.