In early pregnancy, it is normal to experience nausea when smelling grease and smoke. In early pregnancy, when you do not smell the smell of grease, you may also experience nausea and vomiting, which is caused by the increase of estrogen and progesterone during pregnancy, especially in the morning when the symptoms are more obvious. If it is not serious, this condition usually does not require special treatment, try to eat a light diet, do not eat too greasy food, keep your mood relaxed, do not have too much stress, and try to keep the environment clean and fresh. If you feel that the pregnancy reaction is more serious, you can eat less and more meals, and if necessary, take some drugs to control the pregnancy reaction, you can eat such as vitamin B6 treatment.