The timing of the onset of pregnancy vomiting in pregnant women depends on individual circumstances. In general, about 75% of women experience early pregnancy reactions such as nausea, vomiting, drowsiness, and weakness at 6 weeks of pregnancy. Some pregnant women may experience vomiting at 4 weeks of pregnancy, and some may not even experience vomiting throughout their pregnancy. It usually does not last long and disappears in about 50% of pregnancies at 14 weeks of gestation, in some cases until about 18 weeks of gestation, and in some cases throughout pregnancy. However, severe vomiting may cause nutritional and metabolic problems in pregnant women, which may affect the growth and development of the fetus. Therefore, for pregnant women who have severe vomiting and are unable to eat, it is recommended that they seek medical attention in a timely manner and require fluids to replenish their energy. For pregnant women with normal vomiting, it is recommended to eat less and more meals, not too much at a time, and more vitamin and protein-rich food. At the same time, it is necessary to take proper rest, avoid exertion and cold, eat more fresh fruits and vegetables, drink more water, forbid to eat greasy, spicy and cold stimulating food, and pay attention to keep the pubic hygiene clean. In addition, sexual intercourse should be prohibited in early pregnancy to avoid miscarriage.