It is a normal reaction for pregnant women to vomit after eating unclean food. Most of the unclean food will breed bacteria, which will cause gastrointestinal irritation and lead to vomiting, diarrhea and other symptoms. If the pregnant woman accidentally ate unclean food, simply just vomiting symptoms, and not accompanied by abdominal pain or other symptoms, then the impact on the fetus is not too great, no special treatment, to observe the main. If a pregnant woman who has eaten unclean food not only vomits, but also suffers from abdominal pain, diarrhea and other symptoms, then she needs to go to the hospital for a detailed examination. Through clinical ultrasound to observe the state of the fetus, to exclude the possible harm to the fetus caused by intestinal bacterial infection, and under the guidance of a professional doctor to carry out treatment, during the period must pay attention to dietary hygiene, with a light diet.