1, food tonifying kidney: There are many foods for tonifying kidney, but the most effective one is animal kidney. The kidneys of pigs, dogs, sheep and cattle all have the functions of nourishing kidney qi and benefiting essence. Symptoms such as kidney deficiency, low back pain, nocturnal emission and enuresis can be supplemented by eating animal kidneys. If sheep kidney is warm, it can tonify kidney qi; Salted pig kidney is beneficial to kidney qi and bladder function, and also effective for kidney deficiency and edema; Dog kidney is flat, which is most suitable for elderly women with kidney deficiency, physical weakness and cold hands and feet. 2. Drugs for tonifying kidney: Liuwei Dihuang Pill is often used for deficiency of kidney yin, among which Radix Rehmanniae Preparata, Cornus officinalis, Rhizoma Dioscoreae, Alismatis Rhizoma, Poria and Cortex Moutan have the function of tonifying kidney yin. Yin deficiency of liver and kidney, blurred eyes, with Liuwei Dihuang Pill and Lycium barbarum and Chrysanthemum as soup. Kidney-yang deficiency type can choose Shenqi Pill, that is, Liuwei Dihuang Pill plus Ramulus Cinnamomi and Radix Aconiti Lateralis. In addition, ginseng, Polygonum Multiflori Radix, Radix Astragali, Glycyrrhrizae Radix, Placenta, Cordyceps, etc. It also has the effects of strengthening the body, tonifying the kidney, promoting metabolism and improving immunity. 3, abstinence and kidney protection: nourishing the kidney is to nourish the essence, and nourishing the essence must be abstinence. Zhang Jingyue, a famous doctor in the Han Dynasty, said: "If you want it, you will be exhausted, and if you want it, you will be scattered. Gaijing can be angry, and qi can be a god. Therefore, those who are good at keeping in good health will cherish their essence. " Exhaustion leads to exuberance, exuberance leads to complete spirit, complete spirit leads to good health, and good health leads to less illness. "The house is overworked, the essence leaks out, and it is easy to consume and hurt the body; Abstinence from sexual intercourse and maintenance of essence can resist aging and prolong life. But don't suppress your sexual desire too much, so as not to cause physical discomfort and psychological obstacles, which will affect your health. 4, foot bath to help the kidney: soak your feet with warm water before going to bed, which can lead blood down, replenish kidney qi, calm your mind and help sleep. There was a governor in the Qing Dynasty who had a "secret of keeping in good health" in his later years: "Walk 300 steps in the morning and have a pot of soup before going to bed". Emphasize soaking feet with hot water before going to bed. This kind of foot bath, the water temperature should be about 40 degrees, and the time should be no less than 5 minutes. Feet should constantly rub against each other. Dry it immediately after taking a shower and rub it with your hands on the soles of your feet for 200 to 300 times. Swallowing saliva often can nourish kidney essence and moisturize skin and hair; Drinking more water can prevent excessive consumption of body fluids. In short, senile diseases and premature senility are mostly caused by deficiency of kidney essence, dissipation of essence and Yang Qi's failure, so middle-aged and elderly people should pay attention to maintaining kidney qi.