When people reach middle age, most of them start to build up their career and it is a good time to give full play to their talents. However, many middle-aged people always feel tired and sluggish, and their energy and stamina are far less than those in their youth, but they can’t find any reason when they go to the hospital for examination. Especially after entering middle age, many people have back pain, tinnitus, insomnia and forgetfulness, hyperactivity and shortness of breath, loss of libido, increased nocturnal urination, graying hair, sparse teeth and other signs of premature aging. In this regard, Western medicine usually uses the term “sub-health” to explain, but Chinese medicine has its own statement. In terms of TCM theory, the essence of health lies in “Yin and Yang are secret, and the spirit is healing”, which is a famous saying from the classic work of TCM “Yellow Emperor’s Classic of Internal Medicine”. It refers to the fact that under normal circumstances, the functions of the five viscera and six internal organs, the vital energy and blood of the body, the four limbs and the fourteen meridians can be coordinated with yin and yang to achieve relative balance, that is, balance is a symbol of health. This “sub-health” state in middle age is mainly due to the imbalance of the body’s yin and yang qi and blood, as well as the imbalance of the heart, liver, spleen, lungs and kidneys, especially the imbalance of the yin and yang of the kidneys, the prominent expression is “kidney deficiency”. Since the kidney is the head of the five viscera, the heart, spleen, lung, liver, and marrow, Chinese medicine considers the kidney as the root of the innate nature and the root of life. The kidney is the master of bone, marrow and essence, reproductive function and water metabolism, and plays an important role in growth and development and life process, and is the prime mover of life. The kidney is the source of all diseases, the kidney is sufficient, the balance of yin and Yang, the body is healthy and prosperous; kidney deficiency, making people tired, immune function and circulatory function decline. Therefore, people in middle age pay attention to the maintenance of kidney energy, not only to prevent disease and health, but also to slow down the aging process. As early as in the Yellow Emperor’s Classic of Internal Medicine, there is a statement that “the year 40 is half of the yin energy, living from the decline”. It means that after forty years old, just like the sun in the afternoon, to gradually go into decline, each organ began to age. Someone had a survey of 235 people over the age of twenty, of which the rate of kidney deficiency at the age of thirty is 58%, forty years old is 71%, fifty years old is 80%, sixty years old is 90%, seventy years old is 95%. This shows that the incidence of kidney deficiency increases with age. In today’s society, the accelerated pace of life, work tension, environmental pollution, unreasonable diet and other reasons, no doubt also aggravated the various signs of kidney deficiency disease. Therefore, it is clear that people in middle age to slow down the aging process, we must also focus on kidney supplementation to start. Usually, according to each person’s physical condition, you can take some Chinese medicine for the kidney. If you often have symptoms such as back pain and dizziness, tinnitus and night sweats, spermatorrhea and sore throat, dry mouth and red tongue and thin pulse, you can take Liu Wei Di Huang Wan or Zuo Gui Wan; if you often have back pain and dizziness, fear of cold and night sweats, shortness of breath, impotence and premature ejaculation, pale face and pale tongue and slow pulse, you can take Jin Kui Kidney Qi Wan or Right Gui Wan, and you can take them all year round. At the same time, in addition to follow the laws of nature, moderate work and rest, abstain from sexual intercourse, and actively treat existing chronic diseases. You can also choose several self-care methods to benefit the kidneys and strengthen the body: 1, the sound of the sky drum: with two palms close to the ears, ten fingers press the back of the head, and then rhythmically use the tip of the index finger to play to the occipital bone depression. Play 50 times each time, once in the morning and once in the evening, which is effective for dizziness and tinnitus, forgetfulness and diminished thinking ability. 2, Mo kidney area: the palms of both hands in a clockwise direction to massage both sides of the waist, 50 turns each time, and then rub the back of the waist with both hands up and down, 10 minutes each time, can prevent kidney deficiency. 3, fill the kidney essence: cross-legged meditation, intention to keep the Dantian, and then every half a minute to swallow saliva, can fill the kidney essence. 4, the anal muscle: before going to bed to contract the anal muscles 50 to 100 times, for the treatment of premature ejaculation, sexual dysfunction is beneficial. At the same time, in the medicinal diet, often take wolfberry red dates porridge, onion stewed pig’s trotters and other meals, on the panic and insomnia, dizziness and kidney qi decline caused by the room labor injury has a certain effect. You can also choose to serve more tamari, shrimp, loach, donkey meat, oysters, quail, eggs, snake meat, pigeon meat, dog meat, leek, lychee, sparrow, sheep kidney, wolfberry, pine nuts and other kidney tonic food, on the middle-aged kidney deficiency, has a certain effect of strengthening the body.