When pregnant women do nucleic acid test, due to the cotton swab stimulation of the pharynx, produce vomiting reaction, mostly belong to the normal situation, can be relieved by deep breathing, divert attention, after the test to drink the right amount of warm water and other ways. Pregnant women should try to maintain an empty stomach before the nucleic acid test to help reduce the probability of vomiting, you can breathe deeply, divert attention to ease the tension, which is conducive to relieving vomiting. In addition, drinking some warm boiled water in moderation can moisturize the digestive tract, relieve vomiting and alleviate the discomfort. Pregnant women do nucleic acid test vomiting generally after rest and adjustment can be relieved on their own, if the nausea and vomiting for a long time failed to relieve, it is recommended to go to the hospital in a timely manner to seek medical attention, not blindly use medication, should be under the guidance of the doctor for diagnosis and treatment.