Quaternary prevention is like wearing a seatbelt when you're in a car. It's a way of protecting yourself before something bad happens. Quaternary prevention means taking steps to prevent something from getting worse. It's a way to prevent over-medicalization, which is when people are given too much medical treatment. For example, getting a certain medicine for an illness might not be the best choice if it causes more problems than it solves. Quaternary prevention means choosing the right treatment or taking steps to help a problem before it becomes worse.