Causes of Chewing Ice:
Craving ice can be a symptom of anemia caused by an iron deficiency.
If your ice chewing feels compulsive, consult with your doctor immediately. They can help to determine what is causing your cravings and recommend treatments and solutions.
If you find yourself chewing ice to cool down or to help with dry mouth, try switching to cold drinks or sugar-free popsicles. These alternatives could help fill the void without such a serious risk to tooth enamel.
Of course, the best advice for your oral health will always come from consulting with your dentist.