From a medical point of view, there is no clear rule on how many times a week coffee should be drunk, and it should be based on one’s own needs and physical condition. If you are in good condition and have no underlying disease, and you experience brain fatigue and poor mental performance, you can refresh yourself by drinking coffee. In this case, you can drink 1 to 3 cups of coffee a day, but not more than 3 cups. However, if you are in poor condition and suffer from underlying diseases such as high blood pressure, it is not recommended to drink coffee to avoid symptoms such as headache and dizziness. If you suffer from gastric ulcer and other diseases, try not to drink coffee, as coffee will stimulate the secretion of gastric acid, and frequent drinking of coffee may aggravate the condition. In addition, it is not recommended to drink large amounts of coffee for a long period of time. Excessive drinking of coffee may cause undesirable symptoms, such as insomnia and neurasthenia.