Hey - welcome! As someone whose walked your path I know it can be hard - I personally didn't have a lot of pain and fatigue post op - I mean not in the way you describe it. But it makes sense that you would be tired as your body is still trying to heal. The arm and leg issues is something else - I has stiffness and weakness but that was directly related to the neck dissection. I would ask your dr. About iit, though. It could perhaps be the residual effects of the anesthesia some times it takes a long while to clear your liver or kidneys depending on how effective they are. Glad you are cancer free but please keep a close eye on your neck for any suspicious lumps. Sometimes satellite cells sit dormant in the nodes and flare up post op. Mind you that all depends on the size and aggressiveness of the original tumor. Surgery and cancer affect everyone differently. Good luck... Heal well and try to make sure you're eating enough protein, and iron, and drinking enough fluids - diet really helps he healing process. Someone I'm sure will be along soon that may have experienced something similar.