Spring is a good season for health preservation. For the elderly, it is necessary to arrange their diet reasonably according to their specific physical conditions, and not all elderly people should be the same. The temperature changes greatly in spring, so the nutrients in spring should be mainly high in calories. Because hot and cold stimulation will accelerate the decomposition of protein in the body, leading to the decline of body resistance and illness, it is necessary to supplement high-quality protein food, such as eggs, fish, chicken and bean products. In spring, bacteria, viruses and other microorganisms begin to multiply in large numbers, and their vitality is enhanced, which is easy to invade the human body and cause diseases. Therefore, you should take enough vitamins and inorganic salts in your diet. Fresh vegetables such as Chinese cabbage, rape, bell pepper and tomato, and fruits such as citrus and lemon are rich in vitamin C, which has antiviral effect. Yellow-green vegetables such as carrots and amaranth are rich in vitamin A, which can protect and strengthen epithelial cells of upper respiratory mucosa and respiratory organs, thus resisting various pathogenic factors. Food rich in vitamin E should also be eaten to improve human immune function and enhance the body's disease resistance. This kind of food includes sesame, blue cabbage and cauliflower. Chinese medicine also believes that it is advisable to keep sour and sweeten in spring to nourish the temper. This is because the liver qi is the strongest in spring, which will affect the spleen, so it is easy to be weak in the spleen and stomach in spring. Eating more sour food will make liver function hyperfunction, so the diet in spring should be nursed back to health, so it is advisable to choose spicy and warm products and avoid acidity. Diet should be light and delicious, avoid greasy, cold and irritating food. Health in spring needs food supplement. However, according to the characteristics of the gradual increase of human yang in spring, we must choose a flat and clear diet to avoid backfiring. Nutritionists believe that middle-aged and elderly people with premature aging, people suffering from various chronic diseases, people with thin bodies, people with backache, dizziness, sallow complexion and listlessness can make use of this season of spring to choose appropriate food supplements according to their own physique and illness, so as to achieve the purpose of preventing and treating diseases. Older people with the above situation can take a plain diet. Foods with this effect are: buckwheat, barley and other cereals, beans such as soybean milk and red beans, fruits such as oranges and apples, sesame seeds and walnuts, which can be taken for a long time. If the elderly have internal heat due to yin deficiency, they can choose the method of clearing and replenishing. This kind of food includes: pear, lotus root, shepherd's purse, lily and so on. This kind of food is cold, and it has the function of clearing away heat and diminishing inflammation after eating, which is helpful to improve bad physique. Generally speaking, the tonic for the sick or recovered elderly should be mainly cool, light, delicious and digestible, and rice porridge, lotus seed porridge, green vegetable paste and pork floss can be selected. Traditional Chinese medicine believes that a hundred herbs sprout back and all diseases break out, which means that it is easy to relapse in spring. Because it is warm and windy in spring, it is suitable for the reproduction and spread of microorganisms such as bacteria and viruses. Therefore, there are many exogenous factors in spring, which should be paid more attention to for the elderly who are weak. Facts have proved that in spring, people with hyperactivity of liver yang are particularly prone to headache and dizziness, which is why Chinese medicine has long pointed out that people with spring spirit are suffering from various diseases. Modern medicine also found that climate change in spring can easily raise people's blood pressure, causing headaches, dizziness, insomnia and other symptoms. The diet prevention method is to eat 250,500 grams of bananas or oranges every day, because bananas contain potassium ions that can lower blood pressure. In addition, regular consumption of lemon, pear and mung bean with more potassium is also beneficial to the prevention and treatment of hypertension. Gastric and duodenal ulcer diseases are also prone to occur in spring. Avoid eating pork soup, chicken soup, fish soup, beef soup, spinach, beans, animal offal and irritating condiments rich in creatine, purine and other substances, because these foods have a strong effect of stimulating gastric juice secretion or forming gas to produce abdominal distension, which increases the gastrointestinal burden. Diet prevention, honey therapy can be used. After steaming honey water, take it on an empty stomach before meals, daily 100 ml, and take it three times. Or use 250 ml of milk, boil it, add 50 g of honey and 6 g of bletilla striata, and mix well before drinking. These all have the effect of nourishing yin and benefiting the stomach.