What causes my nausea?

Show nausea and vomiting symptoms, women first consider whether it is pregnancy caused by morning sickness; secondly consider whether there are digestive tract diseases, such as common gastroesophageal reflux disease, gastritis, stomach tumor, etc.; also need to consider whether their recent chemotherapy, radiotherapy, etc.; there are some diseases related to vestibular organs can also cause nausea, such as otolithiasis, vestibular paroxysms, etc. It is recommended to go to the hospital to do relevant examinations to identify the causes of nausea.