A new family has moved in across the road. They have a little girl who my DD has made friends with. She is lovely. Bright, bubbly happy and healthy but has SEVERE tooth decay. My DD had tooth decay (now resolved for over two years) and sees a specialist dentist to give her teeth extra protection. As a result, I'm very clued up now on how painful and damaging, short and long term tooth decay of this level can be if left. All her teeth are badly decayed. She showed me her 'new tooth' today, which was her top front tooth emerging deformed with a black tip next to four black patches (teeth rotted away to nothing) flush with her gum. When she smiles, her bottom teeth are very obviously decayed also. Also her upper lip is constantly swollen from the infection. Her breath smells and I think it's probably because of the very severe decay. She is fiddling with her mouth all the time. The family is new to the UK and may not have had the knowledge of how to look after her teeth, they may not have had access to dentists. It really is very severe. I don't know if I should try and talk to the mum. I will probably really offend her. What should I do?