Motion sickness, including car sickness, occurs when the brain receives conflicting information from the inner ears, eyes, and nerves in the skin. The inner ear senses motion, while the eyes and skin may not, leading to confusion in the brain. This confusion can cause symptoms such as nausea, vomiting, dizziness, headache, and sweating. Some people are more prone to motion sickness than others, and the following factors can increase the likelihood of experiencing it:

• Age: Children between the ages of 2 and 12 are more likely to experience motion sickness than adults.
• Gender: Women are more likely to experience motion sickness than men, possibly due to hormonal differences.
• Genetics: Some people may be genetically predisposed to motion sickness.
• Medical conditions: Sinus congestion, ear infections, migraines, and other medical conditions can increase the likelihood of experiencing motion sickness.
• Medications: Certain medications, such as antibiotics, NSAIDs, and birth control pills, can make people more susceptible to motion sickness.

To prevent car sickness, people can take several steps, including sitting in the front seat, keeping their eyes on the horizon, avoiding reading, and resting their head against the seat back. Medications like the scopolamine patch can also help prevent nausea.