Nausea – Causes, Symptoms and Treatment
Nausea is an uncomfortable sensation in the stomach often accompanied by the urge to vomit. It is a common symptom with many possible causes.
Things worth knowing about "Nausea"
Nausea is an uncomfortable sensation in the stomach often accompanied by the urge to vomit. It is a common symptom with many possible causes.
What is Nausea?
Nausea is an unpleasant, often wave-like sensation in the upper abdomen or throat that is frequently accompanied by the urge to vomit. It is not a disease in itself but rather a symptom that can point to a wide variety of underlying conditions. Nausea can be short-lived and harmless, but it can also indicate a serious medical condition that requires professional evaluation.
Causes
The causes of nausea are diverse and can be grouped into several categories:
Gastrointestinal Causes
- Gastrointestinal infections (e.g., viral or bacterial gastroenteritis)
- Food poisoning
- Gastritis (inflammation of the stomach lining)
- Peptic ulcers or gastroesophageal reflux disease (GERD)
- Irritable bowel syndrome
Medications and Substances
- Chemotherapy for cancer treatment
- Antibiotics, pain relievers (e.g., ibuprofen, aspirin)
- Alcohol or drug misuse
Pregnancy
Nausea is especially common during the first trimester of pregnancy, often referred to as morning sickness. It is triggered by hormonal changes, particularly a rise in the hormone hCG (human chorionic gonadotropin).
Neurological and Psychological Causes
- Migraine headaches
- Vertigo and balance disorders (e.g., Meniere's disease)
- Motion sickness (kinetosis)
- Anxiety disorders and severe stress
Other Causes
- Cardiac conditions (e.g., a heart attack can present with nausea)
- Kidney or liver disease
- Thyroid disorders
- Postoperative nausea and vomiting following anesthesia
Symptoms and Associated Signs
Nausea rarely occurs in isolation. Common accompanying symptoms include:
- Vomiting
- Dizziness or lightheadedness
- Increased salivation
- Pallor and sweating
- Abdominal pain or stomach cramps
- Loss of appetite
- Rapid heartbeat (in some cases)
Diagnosis
Because nausea is a symptom rather than a standalone condition, the diagnostic process focuses on identifying the underlying cause. A healthcare provider will begin with a thorough medical history, asking questions such as:
- When does the nausea occur – in the morning, after eating, or in specific situations?
- Are there accompanying symptoms such as vomiting, pain, or fever?
- What medications are currently being taken?
- Is there a possibility of pregnancy?
Depending on the suspected cause, the following investigations may be conducted:
- Blood and urine tests
- Abdominal ultrasound
- Upper endoscopy (gastroscopy)
- Imaging studies such as CT or MRI for neurological concerns
Treatment
Treatment always depends on the underlying cause. The following measures may help:
General Measures
- Rest and relaxation
- Adequate fluid intake (water, herbal tea) to prevent dehydration
- Light, easily digestible foods (e.g., crackers, rice, bananas)
- Fresh air and an upright posture
Home Remedies
- Ginger (as tea or capsules) has demonstrated antiemetic properties
- Peppermint tea can have antispasmodic and soothing effects
- Acupressure at the P6 point (inner wrist) may help with motion sickness
Medications
For more severe or persistent nausea, antiemetic medications are used, such as:
- Dimenhydrinate (e.g., for motion sickness)
- Metoclopramide (MCP) for gastrointestinal nausea
- Ondansetron for chemotherapy-induced nausea and vomiting
- Domperidone to promote gastric emptying
When to See a Doctor
In most cases, nausea is harmless and resolves on its own. However, medical attention is recommended if:
- Nausea persists for more than 2–3 days
- Projectile or bloody vomiting occurs
- Severe abdominal pain or fever is present
- Signs of dehydration appear, such as dry mouth, dizziness, or significantly reduced urination
- Nausea occurs following a head injury
- Nausea is severe during pregnancy (hyperemesis gravidarum)
References
- World Health Organization (WHO): Symptom Management Guidelines. Geneva: WHO Press, 2023.
- Hasler WL. - Nausea, Vomiting, and Indigestion. In: Harrison's Principles of Internal Medicine, 21st Edition. McGraw-Hill Education, 2022.
- National Institute of Diabetes and Digestive and Kidney Diseases (NIDDK): Nausea and Vomiting – Overview and Treatment Options. U.S. Department of Health and Human Services, 2023.
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