You Replaced One Joint… But Now the Other One Hurts Maybe you had a knee or hip replaced—and it helped. The pain eased, the joint stabilized, and you got back to moving again. But something feels different now. The other side—the joint you’ve been relying on to “carry the load”—is starting to ache, feel unstable, or simply not perform like it used to. This isn’t your imagination. Joint replacements change how your body moves. When one part is replaced, it alters force distrib