Why do I feel nauseous when riding in a car on an empty stomach?

Under normal circumstances, nausea or vomiting while riding in a vehicle on an empty stomach may be caused by an empty stomach condition, pregnancy-related reactions, anxiety and stress, excessive hunger, hypoglycemia (low blood sugar), etc. It is recommended to seek medical attention promptly, identify the underlying cause, and receive appropriate symptomatic treatment under the guidance of a qualified physician. Specific explanations are as follows:

1. Effects of an Empty Stomach

When the stomach is empty, gastric acid secretion increases, but there is no food to buffer it. This allows gastric acid to directly contact the stomach lining, potentially irritating the gastric mucosa and causing nausea. Additionally, low blood sugar levels during fasting may worsen motion sickness symptoms. It is advisable to eat a light, easily digestible meal—such as bread or fruit—before traveling to avoid riding on an empty stomach.

2. Pregnancy-Related Reactions

Pregnancy-related nausea and vomiting are associated with hormonal changes, particularly increased levels of progesterone, which can affect gastrointestinal motility and digestion, leading to feelings of nausea and vomiting. During travel, body movements and motion may intensify these symptoms. Maintaining healthy lifestyle habits, avoiding spicy or greasy foods, consuming more fresh fruits and vegetables, and ensuring adequate rest are recommended.

3. Anxiety and Stress

Chronic psychological stress and anxiety can disrupt the autonomic nervous system, impairing normal gastrointestinal function. While riding in a vehicle, the combination of body motion and confined space may amplify feelings of anxiety, triggering nausea and vomiting. Maintaining a healthy lifestyle, engaging in regular physical exercise, and practicing relaxation techniques such as deep breathing and meditation can help alleviate stress and anxiety.

4. Excessive Hunger

Going for long periods without eating leaves the stomach empty and causes excessive secretion of gastric juices, which can irritate the gastric mucosa and lead to nausea. In such cases, consuming a moderate amount of food usually helps relieve symptoms.

5. Hypoglycemia (Low Blood Sugar)

Hypoglycemia is typically caused by malnutrition. When fasting, glucose levels in the bloodstream drop, leading to symptoms such as nausea, vomiting, dizziness, palpitations, and sweating. During travel, physical movement and environmental changes may exacerbate these symptoms. Treatment should follow medical advice and may include medications such as furosemide tablets, carbamazepine tablets, or phenobarbital tablets.

To prevent these issues, avoid prolonged fasting; consume light, easily digestible meals before traveling; maintain healthy lifestyle habits; manage psychological well-being to reduce stress and anxiety; and follow a balanced diet to prevent hypoglycemia and keep the body in optimal condition.