Dry heaving in early pregnancy is a normal physiological phenomenon and is the main manifestation of early pregnancy reaction. The main reason for the occurrence of early pregnancy reaction is the increase of HCG level secreted by embryonic trophoblast cells after the fertilized egg is laid, coupled with the change of estrogen and progesterone level, which affects the normal function of gastrointestinal tract. As the speed of HCG level elevation in the body and the degree of changes in estrogen and progesterone levels vary in different pregnant women in early pregnancy, coupled with the different sensitivity of individuals to these hormonal changes, the time of occurrence, severity and specific manifestations of early pregnancy reaction differ. If the symptoms are not serious and do not affect normal dietary intake, there is usually no major problem and no special treatment is needed, and it will disappear on its own in the third month of pregnancy. Try to avoid the stimulation of oil and smoke in daily life, do not eat greasy food, and pay attention not to overexert yourself.