Sophie Mattes suffers from a rare condition called Gastroparesis. The condition prevents her from experiencing feelings of hunger.
Here's Liz Wickham's full report into Sophie's daily struggles.
Sophie Mattes from Edgware was told by doctors that she was anorexic when she stopped eating and lost weight. But her problem was that she always felt full after eating small amounts.
Eventually, she was diagnosed with gastroparesis, a condition where a crucial nerve in her stomach is paralysed. She has now been fitted with a pacemaker which allows her to eat more food. Sophie spoke to Liz Wickham.