A persistent craving to chew or suck on ice may be more than a harmless habit and could sometimes be associated with iron deficiency, according to Dr G Vimal Kumar, senior consultant in paediatric haematology, oncology, blood and marrow transplantation at MGM Cancer Institute. The condition of repeatedly craving and consuming ice is known as pagophagia and has been linked with iron-deficiency anaemia.

The exact reason why people with iron deficiency develop an urge to chew ice is not fully established. However, one explanation is that chewing ice may temporarily increase alertness or provide a refreshing sensation, particularly when low iron levels are associated with tiredness or difficulty concentrating. Another theory suggests that the activity may briefly affect blood flow to the brain and make a person feel more awake.

Dr Kumar stressed that a persistent desire for ice should not automatically be dismissed as an unusual preference. While occasional ice chewing may not necessarily indicate a medical problem, a strong and continuing craving can be a reason to investigate possible nutritional deficiencies. Iron deficiency is common and can occur even when a person has not yet developed noticeable symptoms.

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People who develop a frequent habit of chewing ice should consider discussing it with a healthcare professional rather than waiting for other symptoms to appear. Iron-deficiency anaemia can sometimes occur without obvious signs such as marked weakness or paleness, making appropriate medical evaluation important when unusual symptoms persist.

A doctor may recommend blood tests to assess the blood count and iron levels and determine whether iron deficiency is present. Other factors can also contribute to anaemia, so the underlying cause should be identified rather than assuming that an ice craving alone confirms iron deficiency. Medical advice can help determine whether further testing or treatment is required.

According to Dr Kumar, addressing the underlying iron deficiency generally helps resolve the craving when the two are related. Therefore, someone experiencing a sudden or persistent urge to chew ice should treat the change as a possible health clue and seek professional advice, particularly if the habit continues or is accompanied by other concerns.

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