Coffee has an effect on blood pressure, and drinking coffee can cause a rise in blood pressure over a short period of time, especially in people who are obese, where the rise in blood pressure may be more pronounced. Long-term coffee drinkers generally have higher blood pressure than non-coffee drinkers. Coffee contains caffeine, which can excite the sympathetic nerves and cause an increase in blood pressure, and can also affect the absorption of calcium. It is recommended that you do not add milk, granulated sugar and other high-sugar, high-fat foods when you drink coffee, so as not to increase your body weight and aggravate high blood pressure. Drinking coffee has four taboos, one, do not smoke while drinking coffee, smoking coffee will lead to excessive brain excitement, caffeine in the mutagenic effect of nicotine, will stimulate the production of cancer cells. Don’t drink coffee when taking medicine. Third, children should not drink coffee. Fourth, pregnant women and lactating women had better not drink coffee, caffeine can enter into the fetus through the placenta, which is very unfavorable to the development of the fetus.