Our bodies can react badly to certain foods and other things. It’s really important to know if our own bodies have this kind of problem, because that way we can avoid whatever it is that our body dislikes.

Doctors can find out by doing some tests. They use Charlie the Caterpillar. He has different areas of his body, which will change colour if you are allergic to a particular food.

When the doctor does the test, he’ll draw Charlie on your arm. Don’t scratch! You might also have a bit of your blood taken. This can tell the doctors things, too.

If you do have an allergy, there are ways to look after yourself. You might grow out of it, too. The doctors will test you for that in time. It’s OK, you and your body will be looked after!