There is no clear statement that “four kinds of people should not drink mulberry leaf water”, but it is not recommended for people who have a cold constitution, people with gastrointestinal discomfort, menstruating women and pregnant women. The Chinese herb mulberry leaf is sweet, bitter and cold in nature, and has the effect of clearing the lungs and moisturizing dryness, clearing the liver and improving eyesight (clearing liver fire to promote the recovery of eyesight), and evacuating wind-heat. Drinking it in water helps to relieve liver fire, redness and swelling of the eyes, and lung heat and dry cough. It is helpful for some people who are irritable, irritable, coughing and have a lot of fire. Because of the cold nature of mulberry leaves, so for some people with cold body, cold limbs, bad intestines and stomach, the use of mulberry leaf water will instead aggravate the cold body, aggravate the condition, but instead cause stomach pain, diarrhea and other symptoms. Pregnant women and menstruating women, are not suitable to use mulberry leaf water. Although mulberry leaf water has a certain effect, but do not drink excessively for a long time, should be used under the guidance of a doctor, so as not to delay the condition.