Phosphorus helps to keep your bones healthy and strong. However, too much phosphorus can lead to bone disease, and it can also cause itching skin and painful or swollen joints, so you may need to limit the amount of phosphorus in your diet if your kidneys are unhealthy. Some examples of foods that are high in phosphorus include beer, dark sodas, milk, ice cream, yogurt, cocoa, kidney beans, chick peas, lentils, nuts, and seeds. Try eating sherbet or popsicles instead of ice cream, mixed vegetables instead of beans, and hard candies instead of chocolate.