Spots are the traditional preserve of teenagers, but what can you do when a pre-teen starts developing pimples? At what age do you start giving tetracycline for acne in adolescents? And why is it important to let a specialist take a look at any unusual skin marks?

Raisingkids.co.uk's skin specialist, Dr Bernice Krafchik (Professor of Dermatology and Paediatrics at the University of Toronto) advises.

• Ask Our Experts: Pre-Teen Pimples
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• Ask Our Experts: When To Start Tetracycline