Gastrointestinal infections (37%) and food poisoning are the two most common causes of acute nausea and vomiting. Side effects from medications (3%) and pregnancy are also relatively frequent. There are many causes of chronic nausea. Nausea and vomiting remain undiagnosed in 10% of the cases. Aside from morning<unk> , there are no sex differences in complaints of nausea. After childhood, doctor consultations decrease steadily with age. Only a fraction of one percent of doctor visits by those over 65 are due to nausea. Gastrointestinal Gastrointestinal infection is one of the most common causes of acute nausea and vomiting. Chronic nausea may be the presentation of many gastrointestinal disorders, occasionally as the major symptom, such as gastroesophageal reflux disease, functional dyspepsia, gastritis, biliary reflux, gastroparesis, peptic ulcer, celiac disease, non-celiac gluten sensitivity, Crohn's disease, hepatitis, upper gastrointestinal malignancy, and pancreatic cancer. Uncomplicated Helicobacter pylori infection does not cause chronic nausea. Food poisoning Food poisoning usually causes an abrupt onset of nausea and vomiting one to six hours after ingestion of contaminated food and lasts for one to two days. It is due to toxins produced by bacteria in food. Medications Many medications can potentially cause nausea. Some of the most frequently associated include cytotoxic chemotherapy regimens for cancer and other diseases, and general anaesthetic agents. An old cure for migraine, ergotamine, is well known to cause devastating nausea in some patients; a person using it for the first time will be prescribed an antiemetic for relief if needed. Pregnancy Nausea or "morning<unk> " is common during early pregnancy but may occasionally continue into the second and third trimesters. In the first trimester nearly 80% of women have some degree of nausea. Pregnancy should therefore be considered as a possible cause of nausea in any sexually active woman of child-bearing age. While usually it is mild and self-limiting, severe cases known as hyperemesis gravidarum may require treatment. Disequilibrium A number of conditions involving balance such as<unk><unk>  and vertigo can lead to nausea and vomiting. Gynecologic Dysmenorrhea can cause nausea. Psychiatric Nausea may be caused by depression, anxiety disorders and eating disorders. Potentially serious While most causes of nausea are not serious, some serious conditions are associated with nausea. These include pancreatitis, small bowel obstruction, appendicitis, cholecystitis, hepatitis, Addisonian crisis, diabetic ketoacidosis, increased intracranial pressure, spontaneous intracranial hypotension, brain tumors, meningitis, heart attack, rabies carbon monoxide poisoning and many others. Comprehensive list Inside the abdomen Obstructing disorders * Gastric outlet obstruction * Small bowel obstruction * Colonic obstruction * Superior mesenteric artery syndrome Enteric infections * Viral infection * Bacterial infection Inflammatory diseases * Celiac disease * Cholecystitis * Pancreatitis * Appendicitis * Hepatitis Sensorimotor dysfunction * Gastroparesis * Intestinal pseudo-obstruction * Gastroesophageal reflux disease * Irritable bowel syndrome * Cyclic vomiting syndrome Other * Non-celiac gluten sensitivity * Biliary colic * Kidney stone * Cirrhosis * Abdominal irradiation Outside the abdomen Cardiopulmonary * Cardiomyopathy * Myocardial infarction (heart attack) * Paroxysmal cough Inner-ear diseases *<unk><unk>  * Labyrinthitis * Malignancy Intracerebral disorders * Malignancy * Hemorrhage * Abscess * Hydrocephalus *Meningitis *Encephalitis *Rabies Psychiatric illnesses * Anorexia and bulimia nervosa * Depression Other * Post-operative vomiting * Nociception Medications and metabolic disorders Drugs * Chemotherapy * Antibiotics * Antiarrhythmics * Digoxin * Oral hypoglycemic medications * Oral contraceptives Endocrine/metabolic disease * Pregnancy * Uremia * Ketoacidosis * Thyroid and parathyroid disease * Adrenal insufficiency Toxins * Liver failure * Alcohol
symptom of Motion sickness
symptom of Stroke
symptom of Legius syndrome
symptom of Myocardial infarction
symptom of Myasthenia gravis
symptom of Thoracic outlet syndrome
symptom of Sprain
symptom of Burn