After pregnancy, hormone level changes, too much nutrients and some changes in the body substances, often cause mood swings of pregnant women, resulting in the phenomenon of fire, which can be manifested as acne, bad breath, mouth ulcers, temper, irritability and constipation in late pregnancy. The above symptoms should not be used casually, the ingredients of many drugs can enter the body of the fetus through the placenta, and produce adverse effects on the fetus, usually need to clarify their own situation, and the corresponding conditioning, as follows: 1, first of all, to clarify the specific causes of fire in pregnant women, symptomatic treatment, the clinical fire in pregnant women to the majority of real heat; 2, moderate consumption of food with detoxifying effect of heat, such as chrysanthemum, cucumber, bamboo shoots, green beans, water chestnuts, etc. The above foods have antibacterial and anti-inflammatory effects, and are suitable for all kinds of real fire symptoms; and eat more vitamin-rich vegetables and fruits, drink more water, and eat less spicy fried food; 3, milk not only does not get on fire, but also detoxifies heat and liver fire. The Chinese medicine believes that milk is slightly cold, can play the effect of fire by nourishing Yin and detoxification of heat, and there is up to 70% of water in milk, can replenish the body due to sweating and loss of water; 4, life needs to pay attention to the combination of work and rest, to maintain an optimistic and positive attitude towards life.