Why do I have suddenly yellow teeth?

Sometimes it is happens because of some internal problems in our body.It is good thing that you take care of your health and not taking the acidic foods and many more.Don't worry there are so many ways to whiten the teeth.As per my information there is a most popular treatment called teeth whitening which gives the best result to whiten the teeth.It clear all the dark spots and discoloration on the teeth.It is also free from all types of pain and discomfort.Must try this treatment you will surely get the best result.