If car is stock and has no accident history you most likely have a bulb or switch issue. Have you replaced any bulbs recently? Has windshiled been replaced recently? I am trying to help you think of any easy items that may have caused this. If the fuse keeps blowing you have a short. Either a bulb is shorting out or you have an issue with the dimmer or headlamp switch. One easy thing you can try is remove the rear tail lights and see if the short is still present. If you have the rear bulbs disconnected from circuit and the short still pops the fuse you will need the dealer or someone qualified to trace the short for you. Please do not install another overload fuse into the car, you can only do more harm than good.