People who vomit severely after pregnancy can only indicate a sensitivity to HCG and estrogen, which can cause severe vomiting. This is because after pregnancy, HCG in particular will increase thousands of times, which will lead to some clinical symptoms, such as nausea and vomiting. However, the degree of vomiting varies according to individual differences, and those with severe vomiting may experience electrolyte disorders. The patient should be treated clinically with rehydration and correction of electrolyte disturbance. Other patients may develop acidosis due to severe vomiting, which should be treated clinically with acid correction.