My 82 yr old father, had knee replacement 3 months ago, he's been bedridden since. He wont even feed himself, nor drink. We feed him, put the straw in his mouth to drink, wash him, etc... Whenever we move him to clean him he complaints that the pain is too intense. The doctors don't understand what's going on, all his vitals are good, blood work and urine test are normal. I keep asking him, what does his knee has to do with his inability to use or move his arms and hands. Can he be making himself more sick than what he really is