fun fact: Craving ice is a symptom of iron deficiency. If you like crunching ice after you finish your soda, you might be suffering from anemia. Also known as "pagophagia," the compulsive eating of ice may not just be a nervous tick, but a way of cooling inflammation in the mouth caused by a lack of iron, according to the Mayo Clinic. So if you like chomping down on those cubes, get thee to a doctor, stat.