You may have seen someone chewing chalk, eating clay, or even craving ash, and wondered why they'd engage in such behaviour. While these actions may seem strange or unsettling, for some individuals, ...

Pica is eating something that is not food–notably in large quantities and on a regular basis. What do people who have pica eat? The list is a long one: ashes, balloons, chalk, metal, grass, crayons, ...