Australian traveler John Smith suffered irreparable illness during his vacation, and his medical expenses were raised. But he had more travel insurance than you thought. Because he started traveling in a healthy state. But here the problem occurs. Did you know the range that travel insurance actually covered? In fact, do you know that many travel insurance can reduce medical expenses claims based on what they were before you get sick overseas? If you have any illness before your trip, insurance does not cover all medical expenses related to the disease. By telling you about these pitfalls, we want to help you spend your vacation safely.