Vomiting and diarrhea in late pregnancy may be caused by acute gastroenteritis, which requires dietary adjustments, active use of antibiotics, and attention to correcting dehydration and electrolyte disorders. Vomiting and diarrhea in late pregnancy may be caused by eating unclean food, resulting in an attack of acute gastroenteritis. Pregnant women should adjust their diet and not eat unclean food. Eat as much food as possible in an easy-to-digest fluid diet, and also take plenty of fluids to prevent dehydration from occurring. If the symptoms of vomiting and diarrhea do not improve after dietary adjustment and fluid supplementation, the pregnant woman can go to the hospital to actively control the infection and apply antibiotics, such as penicillin, if necessary, to prevent causing infections in other parts of the body. At the same time, fluids need to be infused to replenish fluids in order to correct dehydration and electrolyte disorders. Antibiotics used in late pregnancy are usually penicillin, but they may cause allergies and other adverse reactions, and need to be used under the guidance of a doctor. If the symptoms are not relieved, it is important to seek medical attention to identify the cause and treat the symptoms.