What's with the nausea from smoking?

The patient smoked and showed nausea and retching. It may be that the patient showed chronic pharyngitis, stomach disease, or nicotine in cigarettes stimulated the patient's stomach to show nausea and retching. The patient should first quit smoking. If the symptoms can improve on their own, don't worry. If they don't improve, they should go to the hospital to see a doctor to see if they show physical disease.