What Foods to Avoid with Kidney Disease - If somebody has decrease urine output and swelling we tell them to reduce water in take if they don't have swelling and a good urine output we tell them to increases the water intake but the blanket restrictions or recommendations are you need to reduce the salt in your diet what ever swelling or what ever symptoms you have, you need to reduce too much protein, red meat, avoid fruit juices, coconut water because these are the sources of potassium and these are the dangerous to kidney.