Meet Yu Yu: the 3-year-old girl whose feet are too big for her body... and are growing larger every day [pictures]

Three-year-old Yu Yu suffers from an undiagnosed condition which causes her feet to grow at an alarmingly rapid rate.

They are constantly swollen and heavy and make moving around for the child, who lives in Xi'an, Shaanxi Province of China, extremely difficult.

Her family are extremely poor, but are slowly raising funds to take the young girl to a doctor and ask for help with her medical condition. Yu Yu's grandfather is planning to take her to Beijing to see a doctor after collecting money by selling several pigs.