Have you noticed discoloration or staining on your teeth that look like spots and not necessarily the usual yellowish stains caused by coffee or tea? This may not really look as troubling as it may seem because you may think that it is just a cosmetic issue. However, there are some causes that may affect your dental health. So, asking why are there white spots on my teeth? is somewhat acceptable. If you are suffering from obvious staining and discoloration of your teeth, visit your dentist to know your options.