The role of tea on human health is undeniable, but there are different requirements for different people, so people with poor health should be careful about drinking tea. The main can be summarized as 31, as follows: 1, fever avoid drinking tea. Caffeine in tea can not only raise the body temperature, but also reduce the effectiveness of drugs. 2, liver patients do not drink tea. The vast majority of caffeine and other substances in tea metabolized by the liver, if the liver is sick, drinking too much tea more than the metabolic capacity of the liver, it will be detrimental to the liver tissue. 3, neurasthenia caution tea. Caffeine in tea has the effect of excitation of the nerve center, neurasthenia drinking strong tea, especially in the afternoon and evening, it will cause insomnia, aggravating the condition, you can drink tea in the morning and afternoon during the day, in the morning may wish to drink flower tea, green tea after lunch, no tea at night. In this way, the patient will be invigorated during the day, the night static comfort, you can go to sleep earlier. 4, pregnant women should not drink tea, especially should not drink strong tea. Tea contains a large number of tea polyphenols, caffeine, etc., on the growth of the fetus in the mother’s womb there are many unfavorable factors, in order to make the normal development of fetal intelligence, to avoid excessive stimulation of the fetus by caffeine, pregnant women should drink less or do not drink tea. 5, women should not drink strong tea while breastfeeding. Drinking strong tea during lactation, too much caffeine will enter the breast milk, the child will indirectly produce excitement after suckling, easily cause less sleep and more crying. 6, ulcer patients should drink tea. Tea is a gastric acid secretion stimulant, drinking tea can cause increased secretion of gastric acid, increasing the stimulation of the ulcer surface, often drinking strong tea will contribute to the deterioration of the disease. However, for mild patients, you can drink some light tea 2 hours after taking the medicine, black tea with sugar, black tea with milk helps anti-inflammatory and gastric mucosa protection, the ulcer also has a certain effect. Drinking tea can also block the synthesis of nitroso compounds in the body to prevent precancerous mutations. 7, malnutrition avoid drinking tea. Tea has the function of decomposing fat, malnutrition, and then drink tea to decompose fat, will make nutrition more poor. 8, drunkenness caution tea. Tea has a stimulating effect on the nerve center, drunk drinking tea will increase the burden on the heart. Drinking tea will also accelerate the diuretic effect, so that the toxic aldehyde in alcohol has not been decomposed from the kidneys, the kidneys have a greater irritation and health hazards. Therefore, the heart and kidney disease or poor function of people, do not drink tea, especially not drink a lot of strong tea; for healthy people, you can drink a small amount of strong tea, to be sober, can be used to eat a lot of fruit, or small mouthfuls of vinegar and other methods to speed up the body’s metabolic rate, so that drunkenness relief. 9, careful to use tea to take medicine. A wide variety of drugs, the nature of different, can take medicine with tea, can not be generalized. Tea tannin, theophylline, and some drugs and chemical changes, therefore, in taking hypnotic, sedative and other drugs and taking iron tonic, enzyme drugs, containing proteins and other drugs, because tea polyphenols are easy to interact with iron and produce precipitation, should not use tea to send drugs, in order to prevent the effect of drugs. Some herbal medicines such as ephedra, hooked vine, Huanglian, etc. should not be mixed with tea, it is generally believed that tea should not be taken within 2 hours. While taking certain vitamin drugs, tea has no effect on the efficacy of the medicine, because the tea polyphenols in tea can promote the accumulation and absorption of vitamin C in the body, at the same time, tea itself contains a variety of vitamins, tea itself also has excitement, diuretic, lowering blood lipids, lowering blood sugar and other effects on the human body can enhance the efficacy of the medicine, restore health is also beneficial. In addition, in the folk often believe that when taking tonic medicines such as ginseng and mushrooms, should not drink tea, there is also some truth to it. 10, anemia patients do not drink tea. Tannic acid in tea can be combined with iron into insoluble end compounds, so that the body does not get enough sources of iron, so anemic patients should not drink tea. 11, urinary stones patients do not drink tea. Urinary stones are usually calcium oxalate stones, because tea contains oxalic acid, will be excreted with urine calcium and the formation of stones, if urinary stones patients then drink a lot of tea, will aggravate the disease. 12, avoid drinking tea on an empty stomach. Drinking tea on an empty stomach will dilute the stomach acid, but also inhibit the secretion of gastric juice, hinder digestion, and even cause palpitations, headache, stomach discomfort, blinking, distraction and other “tea drunk” phenomenon, and affect the absorption of protein, but also cause gastric mucositis. If the “tea drunk”, you can mouth candy or drink some sugar water can be alleviated. 13, avoid drinking a lot of tea before and after meals. About 20 minutes before and after the meal should not drink tea, if you drink tea, will dilute the gastric juice, affecting food digestion, and because tea contains oxalic acid, oxalic acid will react with the iron and protein in the food, affecting the absorption of iron and protein. 14, avoid drinking tea before going to bed. It is best not to drink tea within 2 hours before bedtime, drinking tea will make the spirit excited, affecting sleep, and even insomnia, especially the newly picked green tea, after drinking, the nerves are very easy to excite, causing insomnia. 15, avoid drinking overnight tea. Drinking tea to bubble now drink is better, tea for a long time, not only will lose vitamins and other nutrients, and easy to rancid and spoiled, drink easy to get sick. 16, avoid drinking the first tea. Because modern tea in the planting, processing, packaging process will inevitably be contaminated by pesticides, fertilizers, dust and other substances. The first tea is actually the water to wash the tea, should be as soon as possible to out and then brewed into the boiling water, so that the tea is the most hygienic tea. 17, avoid drinking poor quality tea or spoiled tea. Tea is not easy to properly store, easy to absorb moisture and mold, and some people out of love tea savings, can not discard the moldy tea. Deteriorated tea contains a large number of substances harmful to humans and germs, is absolutely not drinkable. Quality tea after brewing if left too long, the tea soup will also be oxidation and microbial reproduction and deterioration, so the tea can no longer drink. 18, children should not drink strong tea. Because the concentration of tea, tea polyphenol content is too much, easy to interact with the iron in food, is not conducive to the absorption of iron, easy to cause iron deficiency anemia in children. Children can drink some light tea in moderation (one-third of the concentration of tea for adults). For preschool children can drink some coarse tea, because the tea polyphenol content in coarse tea is low. 19, coronary heart disease patients cautiously drink tea. For people with coronary heart disease who have a rapid heart rate, premature beats or atrial fibrillation, because the caffeine and theophylline in tea are stimulants that can enhance the function of the heart, drinking large amounts of strong tea will make the heart beat faster, often leading to its onset or aggravation, so such people can only drink some light tea; in contrast, the heart rate is generally below 60 times / min patients, should drink more tea, not only harmless, but can increase the heart rate, with the The role of drug therapy. 20, the elderly should not drink raw tea. The so-called raw tea refers to the green tea baked without twisting and drying directly after killing. The natural green appearance of this tea, the composition and fresh leaves contain basically the same compounds, low boiling point aldehydes and alcohol compounds transformed and volatilized not much, the fragrance with a serious raw green gas. The elderly drink this green tea, the gastric mucosa irritation is very strong, easy to drink stomach pain; young people will also feel upset stomach after drinking, which is usually called “scraping the stomach”. Mistakenly purchased this raw tea, it is best not to drink directly, can be placed in a non-greasy iron pot, slowly fried with a civilian fire, baked to remove the raw green gas, to be produced after a light chestnut fragrance can be drunk. 21, hypertensive patients should not drink strong tea. The first bubble tea with less than 50 ml of boiling water per gram is “strong tea”. Hypertensive patients who drink too much too strong tea, due to the excitatory effect of caffeine will trigger an increase in blood pressure, which is not conducive to health. 22, diabetic patients should drink more tea. Diabetic patients’ symptoms are high blood sugar, dry mouth and thirst, weakness. Drinking tea can effectively lower blood sugar, thirst, and enhance the effectiveness of physical strength. Patients are generally advisable to drink green tea, drinking tea can slightly increase the amount of tea, several times a day can be bubble drinking, drinking tea at the same time, you can also eat some pumpkin seeds or pumpkin food, with the effect of augmentation. 23, morning immediately after waking up should drink light tea. Because after a day and night of metabolism, the body consumes a lot of water, the concentration of blood is large. Drink a cup of light tea water, not only can replenish water and can also dilute the blood, lower blood pressure. Especially the elderly, drink a cup of light tea water immediately after waking up, for health benefits, drinking light tea water is to prevent damage to the stomach mucosa. 24, diarrhea should drink more tea. Diarrhea is easy to make people dehydrated, produce fingerprint depressions, drink more strong tea, tea polyphenols can stimulate the gastric mucosa, the absorption of water than simply drinking water to be much faster, soon to the body to replenish water, while tea polyphenols have the role of sterilization and dysentery. 25, after eating greasy food should drink tea. Most greasy food is rich in lipids or proteins, its emptying time in the stomach is long, generally about 4 hours, so it is not easy to feel hungry after eating. Food stays in the stomach for too long, will produce a sense of fullness, but also feel thirsty. At this time to drink some strong tea, tea juice and fatty foods to form emulsion, which is conducive to speed up the discharge into the intestines, so that the stomach relief. Border and other ethnic minorities daily to eat beef and lamb and dairy products, daily “rather than a day without food, not a day without tea” is the reason. In order to “eliminate fat” and drink tea, tea can be properly bubble a little thicker, but should drink hot tea, and the amount should not be more, otherwise it will dilute the gastric juice, affecting digestion. 26, after eating too salty food should drink tea. Because eating too salty food will over-eat salt easy to cause a rise in blood pressure, especially hypertensive patients, it is not advisable to eat too salty. Too much salt in the body, not good for health, should drink tea as soon as possible diuretic, excretion of salt. Some pickled foods also contain a large amount of nitrates, after eating nitrates are also prone to react with other food eaten together with secondary amines to produce nitrosamines, nitrosamines are a carcinogenic substance. Drinking tea, especially the high catechin content of senior green tea, can inhibit the formation of carcinogens and enhance immune function. 27, it is appropriate to drink tea after a heavy sweat. Excessive physical labor, will trigger a lot of sweating, working in a high temperature and high heat environment, in order to regulate body temperature, will discharge a large amount of sweat, then drink tea can quickly replenish the body’s water needs, reduce blood concentration, accelerate the excretion of body waste, reduce muscle pain, and gradually eliminate fatigue. 28, mining workers, doctors for X-ray fluoroscopy, computer workers, long hours watching television and printing and copying store workers should drink tea. Because this type of work will be strong or weak by a certain radiation effect, and tea contains tea polyphenols have a certain anti-radiation effect, more tea is beneficial to health. 29, brain workers and night workers should drink tea. Tea contains caffeine, etc., has a refreshing effect on the brain, so writers, scholars and night brain workers to drink more tea, is conducive to improving thinking activities, enhance memory, improve work efficiency. 30, speaking, speaking and singing and other appropriate tea. Engaged in long hours of work with the voice, should always drink tea to moisten the vocal cords, so that the pronunciation is clear, but also to reduce congestion and swelling of the throat, to prevent hoarseness and prevent the occurrence of laryngitis. 31, smokers and often passive smokers should drink more tea Different people are suitable for different tea, according to age, gender, physique, occupation, and even seasonal differences, the demand for tea is not the same. Children should not drink too much green tea because it contains excessive tea tannins, which can affect development and growth. Older people are suitable for drinking pu-erh tea, which can lower cholesterol, diuretic and vascular. People with poor stomach and intestines should try not to drink green tea. Women who love beauty have heard that tea has a nourishing effect on the face, but also can lose weight, any tea is always welcome, in fact, women are Yin, should not drink too much of the cool green tea. Easily feverish people are more suitable to drink Pu-erh tea. Weaker people, drink some black tea is good, such as in the tea and then add some sugar is better, both to increase the heat and can supplement nutrition. Young people are at the peak of development, need more nutrition, to drink green tea is good. Women before and after the menstrual period, the mood is often more irritable, to drink tea is good, because it has the effect of de-stressing the liver and regulating menstruation. People who are obese and wish to lose weight, can often drink oolong tea, tuo tea, etc., because of its strong effect on fat loss. People who consume more beef and mutton, in order to promote the digestion and absorption of fatty foods, can drink more brick tea, tea cakes and other tightly pressed tea. Different jobs are suitable for people to drink tea is not the same. People who are often exposed to toxic substances can choose green tea for health care. People who often work in front of the computer should also choose green tea as an anti-radiation drink. Brain workers, drivers, athletes, actors and so on to enhance the ability of thinking activities, judgment and memory, should drink the famous green tea. Anti-cancer, cancer prevention to green tea is good; lowering blood fat, anti-atherosclerosis to oolong tea, green tea is good; prolong life can choose oolong tea, black tea. Drink tea according to the different seasons and switch, a year only drink a tea is not scientific. Spring application of new tea, showing noble elegance; summer selection of green tea, green and clear, cool and refreshing, cool down the summer; autumn should be used with flower tea, tea fragrance tea color, pleasing to the eye; winter should be used black tea, warm tones, warmth and full of feelings. Drinking tea is beneficial to health, but there are also contraindications: the elderly and infirm, pregnant women, insomniacs should drink less tea; poor kidney function and heart disease avoid drinking strong tea; overnight tea can not drink; should not drink tea during medication; severe arteriosclerosis, hypertension patients, ulcer disease patients, fever patients avoid drinking tea; stomach deficiency, stomach cold, spleen and stomach is bad avoid drinking tea on an empty stomach; children under three years old, women should not drink tea during menstruation, pregnancy; Do not drink spoiled tea.