Craving and chewing ice could possibly be a sign of anemia. Doctors use the term “pica” to describe craving and chewing substances that have no nutritional value such as ice, clay, cornstarch, or paper. Craving and chewing ice is often associated with iron deficiency anemia. It can be linked to other nutritional problems as well. It is not known why some people with iron deficiency anemia crave and chew ice. It may be because of ice’s pain-relieving properties, since some people with iron deficiency anemia experience tongue pain and inflammation. Some researchers have found that ice might have a new and better taste to people who are iron deficient. Pica can be a sign of emotional problems, such as stress, obsessive-compulsive disorder or a developmental disorder. A thorough medical evaluation can help determine if pica is due to an underlying medical condition.