Early signs of tooth decay

You have to watch for signs of decay, as they are usually not obvious in its early stages, and the changes are small, such as a change in the color of your teeth, and there are some yellow or white spots that can be easily missed.
Regular check-ups at the dentist will help you fight cavities in the early stages, because the dentist will examine your teeth from all angles.
You should also not ignore any kind of pain or sensitivity in the teeth, as this may indicate decay.