Hello, my name is Dr.Dorina Gurabardhi. I understand your concern. Nausea and vomiting are not diseases, but they are symptoms of many conditions such as: -Medication-induced vomiting -Emotional stress (such as fear) -Gallbladder disease -Food poisoning -Infections (such as the stomach flu ) -Overeating -A reaction to certain smells or odors -Ulcers To diagnose are necessary some examinations such as blood test. Some advices that I can give to you are: -Drink gradually larger amounts of clear liquids -Avoiding solid food until the vomiting episode has passed -If you are also vomiting an oral rehydrating solution such as Pedialyte should be used to prevent and treat dehydration. Hope my answer was helpful, if you have any other questions I ll be glad to help, thanks!