Are allergies on the increase?
Millions of children have been told they have an allergy - when in fact there is nothing wrong with them.
It's thought around two million children and young people have been wrongly diagnosed with an allergy.
Doctors think this is happening because people are using internet allergy testing kits, which aren't very reliable.
They say the best way to find out if you are suffering from an allergy is to go and see your doctor.
The people who set the rules for doctors are also trying to make allergy testing more reliable.
Expert gives allergy advice
They are suggesting that doctors should use special guidelines to help them spot whether someone has an allergy or not.