Is vomiting nausea gastritis all the time, can you not do gastroscope?

Has been vomiting nausea, may be caused by gastritis, you can go to the hospital to do a gastroscope to see, so as to make a clear diagnosis, of course, in addition to gastritis, there may be cholecystitis, pancreatitis and other diseases, if it is a woman of childbearing age, it is best to rule out the possibility of pregnancy.