It may feel awkward, but it's important to explain to children the risks of sexting, how to stay safe and remind them that they can talk to you if something ever makes them feel scared or uncomfortable.
If you have any concerns about child sexual exploitation or grooming, contact the Child Exploitation and Online Protection Centre (CEOP).
It's easy to send a photo or message but the sender has no control about how it's passed on.
When images are stored or shared online they become public.
They provide free advice on online issues affecting children, including sexting and grooming.
The UK Safer Internet Centre gives advice and resources for parents and professionals on online safety.