what would cause nausea and upset stomach
Nausea and vomiting may occur separately or together. Common causes include: Chemotherapy. Gastroparesis (a condition in which the muscles of the stomach wall don't function properly, interfering with digestion) General anesthesia. Intestinal obstruction. Motion sickness: First aid. Morning sickness.
The timing of the nausea or vomiting can indicate the cause. When appearing shortly after a meal, nausea or vomiting may be caused by food poisoning, gastritis (inflammation of the stomach lining), an ulcer, or bulimia. Nausea or vomiting one to eight hours after a meal may also indicate food poisoning.