The high reaction in early pregnancy indicates that the secretion of human chorionic gonadotropin in pregnant women’s body is high and the concentration of the hormone in the blood is high, and pregnant women are more sensitive to hormonal changes. The common early pregnancy reactions include morning sickness, change in dietary preferences, decrease in appetite and weakness, etc. The early pregnancy reactions will continue until about 10 weeks of pregnancy and will slowly diminish or disappear. Early pregnancy reaction is a normal physiological reaction, the degree and symptoms of which vary greatly from person to person, and severe early pregnancy reaction may last until the middle of pregnancy. Since severe vomiting can easily cause disturbance of acid-base balance and electrolytes, which will affect the health of pregnant women and the normal development of the fetus, it is recommended to go to the hospital in time.