It is possible for injections to cause gastric distress. During the process of performing intravenous infusion, if the infusion is some drugs that are easy to cause gastrointestinal adverse reactions, such as azithromycin, levofloxacin, erythromycin, metronidazole, etc., it may cause the patient to experience abdominal pain, nausea, vomiting, and other adverse reactions, which will lead to gastric discomfort after the injection. Or drug allergy occurs during the infusion process, there may also be an upset stomach, which may also be accompanied by urticaria, angioedema and other symptoms. Patients who need to undergo infusion and injection should actively cooperate with the operation of professional health care personnel, and if serious stomach discomfort occurs, it is recommended to immediately notify the doctor.