What your smile is really telling you

While a nice smile says a lot about a person, what's going on beyond the surface can tell us a whole lot more.

In fact, Dr. Steven Lin, a world-renowned Australian dental nutritionist, says the first signs of underlying illness are in your mouth.

'Tooth problems signal that your body is suffering from a deeper disorder, like heart disease, diabetes, and Alzheimer's,' The Dental Diet author said.

'Learn the signs and make the right changes, and your smile will reveal great oral and overall health.'

Here, FEMAIL looks at some of the signs your mouth could be telling you - and reasons to see your GP and/or dental professional as soon as possible.

More