The pregnancy reaction during pregnancy should last until about three months to stop. If the vomiting phenomenon suddenly appears again at six months, it is considered to be a problem of digestion, which should be a sign of indigestion or gastroenteritis. After this situation, you should pay attention to the observation and differentiation, to see how it is caused by the specific, may be related to the usual diet. After eating too greasy food, or overeating, resulting in indigestion, there will be nausea, vomiting phenomenon. During this period, you can take the appropriate amount of drugs to help digestion lactase or bifidobacterium treatment, can play a role in helping digestion. If there is diarrhea during this period, it indicates acute gastroenteritis, which may be caused by eating unclean food or eating spoiled food. It is best to check the stool routine to determine the condition and then take medication that will not affect the fetus.