When bits of food and the bacteria that feed on them are left on a tooth for too long, they eat away the hard enamel that covers and protects the tooth. the hole that the food and bacteria create is called a cavity.

The easiest way to get a cavity is to forget to brush and floss your teeth, so remember to brush after every meal and brush and floss just before bedtime.

What you eat is also important, lots of sweet, sticky foods like lollies, cakes, and cordials are just what the cavity causing bacteria like.

So try not to eat or drink too many of these things, and when you do, brush your teeth straight afterwards.

If you do get a cavity, the only way to fix it is to see your dentist.