@Debru4 I've moved this post of yours, which you put in another thread '10 months and still in pain', into your own thread here. It's generally not the done thing to ask questions like this in somebody else's thread as my reply risks derailing the other members thread. Don't know if you've noticed, but you will know when it's your thread as your posts will be a different colour to everyone else's. But to answer your question: actually the overriding factor in adhesions (and swelling) is the degree of tissue and circulation around the joint. This differs greatly between the hip and the knee. Because the knee has so little soft tissue around it is one reason why it swells more than the hip and that is also the reason that, uncommon as it is, adhesions are more likely to occur in the knee than the hip. It's actually little to do with the size of the incision and more to do with bulk. Incisions in the knee are much, much bigger than in the hip when compared to the overal bulk of that part of the body. That's why we have so many more problems with pain, stiffness and swelling in the knee than we do the hip. Hence adhesions in the knee while uncommon, in the hip they are as rare as hen's teeth!