Doctors use the term "pica" to describe craving and chewing substances that have no nutritional value — such as ice, clay, soil or paper. Craving and chewing ice (pagophagia) is often associated with iron deficiency, with or without anemia, although the reason is unclear.

Why do anemic people eat ice?

Iron deficiency anemia

Some people with anemia may crave ice as a result of an iron deficiency. One study proposed that this is because ice gives people with anemia a mental boost. Anemia is a medical condition in which your blood doesn't carry enough oxygen to the rest of your body. This results in less energy.

Is it bad to chew on ice?

Why Is Chewing on Ice Bad for Your Teeth? Chewing on ice can cause dental damage like cracked or chipped teeth. It can also damage your enamel, causing increased sensitivity to hot and cold and leaving you more prone to tooth decay and cavities.