From chalk and clay to compulsive ice chewing, pica is a recognised condition often linked to iron deficiency and other health issues. A doctor explains why these cravings happen and when to seek help​From chalk and clay to compulsive ice chewing, pica is a recognised condition often linked to iron deficiency and other health issues. A doctor explains why these cravings happen and when to seek help ​Latest News [ SOBAN NEWS: International and National ]