【Strong kidneys, drink more water and eat blueberries】The British Kidney Research Center found that if you drink at least two liters of water every day, the chance of kidney disease will be reduced by 80%. Blueberries are rich in a substance that can inhibit the attachment of bacteria to bladder tissue. Massage strengthens the kidneys. In addition, regular waist massage can prevent back pain caused by kidney deficiency. Rub your palms together until they are warm, then place them on your waist and massage them up and down 200 times, once in the morning and once in the evening.