Nausea can be caused by various factors, as it is not a disease itself but a symptom of many conditions. Some common causes of nausea include gastrointestinal conditions like food poisoning, infections, ulcers, motion sickness, early pregnancy, reactions to medicines, intense pain, emotional stress, and overeating
. Additionally, chronic nausea can be a symptom of disorders related to the digestive system, such as GERD, peptic ulcer disease, gastroparesis, and migraines
