My Husband Has Very Bad Back Problems. He Has Had

My husband has very bad back problems. He has had this for many years and has tried about everything possible . He has been taking vikeden for years. His pain is getting worse and now his legs are hurting . He had a knee total knee replacement in May . In August he got myrsa and has now been cleared of that. However he seems to feel that his knee is not right and has been having problems ever since. His hips are now hurting too. He is not able to do anything . What can you tell me about this and what can we do?