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I was at the dentist recently, and she pointed out that my front teeth were blotchy and discoloured, then asked me if by any chance I did a lot of running. I'd never heard of this before, but apparently doing a lot of running hard and breathing through your mouth dries out your teeth and causes discolouration.
I asked her what to do about it, and she said I could try having my teeth whitened and see if it worked, but it might not as the discolouration wasn't caused by staining from food, drink and smoking. Now I'm worried I'm going to end up with a gob full of manky brown stumps!
Does anyone know anything about this and how to prevent it?
I appreciate it's not a running injury in the usual sense...