Craving Chalk During Pregnancy? Doctor Explains Pica and Why Woman Crave Non-Food Items

Pregnancy cravings get plenty of attention, but some cravings go well beyond food entirely. Wanting to chew ice, nibble chalk, or even eat paper might sound strange, but it's more common than most people realise, and it has a name: pica. 

In pregnancy, it is usually the body's way of signalling an iron deficiency, not a sign of a psychiatric disorder. Understanding why it happens, and when to reach a doctor, can help you respond to these cravings the right way instead of just feeling embarrassed by them. Read on to know as we reached out to two gynaecologist, Dr Lavanya Kiran and Dr Pooja Rana, who shared their insights on the topic. 

What Is Pica, and Why Do Women Crave Non-Food Items? 

Dr Pooja Rana, Senior Consultant, Gynaecology, The Women’s Hospital, New Delhi, describes pica plainly. "Pica is a craving to eat things that aren't food, and don't offer any nutritional value, like ice, chalk, clay, starch, paper, or even soil." 

Dr Lavanya Kiran, Director and Lead Consultant, Obstetrics and Gynaecology, KIMS Hospitals, Electronic City, Bengaluru, adds that it's "surprisingly common in pregnancy, though many women don't mention it to their doctor because they feel embarrassed." Importantly, she's clear that "it's not a sign of a psychiatric disorder in most pregnant women; it's usually the body signalling something, most often an iron deficiency."

Why Does Pica Happen During Pregnancy?

According to Dr Rana, several factors can drive these cravings:

• The most consistent link is iron-deficiency anaemia. Craving and chewing ice, known as pagophagia, is one of the most specific signs of low iron in pregnancy.
• Zinc or other micronutrient deficiencies can also play a role, though iron is the strongest and best-studied link.
• Hormonal shifts in pregnancy can alter taste, smell, and appetite regulation, which may lower the threshold for unusual cravings.
• Cultural and traditional beliefs matter too. In some communities, eating clay or chalk during pregnancy is a long-standing practice, passed down through generations, independent of any deficiency.
• Psychological factors, including stress or anxiety, can occasionally contribute, though this is less common than nutritional causes.

In some cases, no clear cause is found, and it resolves on its own after delivery.

According to the 2022 study in Clinical Epidemiology and Global Health, researchers screened 739 pregnant women and found that nearly 30% practised pica. The women consumed non-food items such as ash and soil, as well as non-nutritive food items like ice and unripe mango. 

The key finding was that pica was closely linked to poor health and mental strain: 67.3% of the women with pica had anaemia, over a third were underweight, and the vast majority experienced moderate-to-severe stress and heightened anxiety levels.

Is Pica in Pregnancy Dangerous?

It depends entirely on what's being craved and how much of it is consumed, says Dr Kiran:

• Ice in moderate amounts is generally harmless, aside from potential dental issues from chewing it repeatedly.
• Chalk, clay, starch, and soil can be genuinely risky.

They can contain heavy metals, parasites, or bacteria, interfere with the absorption of iron and other nutrients from food, and in some cases cause constipation or bowel obstruction.

Because pica often signals an underlying deficiency, ignoring it means the deficiency itself, commonly anaemia, goes untreated too, which carries its own risks for both mother and baby.

According to the International Journal of Women's Health and Reproduction Sciences, pica in pregnancy is indeed dangerous and harms both the mother and the baby. Eating non-food items replaces nutritious food and prevents the intestines from absorbing essential nutrients. Non-food substances can also carry bacteria, parasites, and heavy metals. 

• For the mother, these cravings can cause intestinal blockages, constipation, dental damage, anaemia, malnutrition, lead poisoning, and severe electrolyte imbalances. 
• For the baby, pica increases serious risks such as preterm labour, low birth weight, and higher mortality rates. 

Overall, it disrupts healthy maternal nutrition at a critical time when the body needs more nutrients

How Is Pica Managed During Pregnancy?

Treatment usually starts with identifying the underlying cause. According to Dr Rana:

• Blood tests to check iron and other nutrient levels are usually the first step, since correcting a deficiency often resolves the cravings.
• Iron supplementation, when a deficiency is confirmed, is the mainstay of treatment.
• Doctors will also gently explore what's being craved and how often, to assess actual risk rather than assuming the worst.
• Emotional support matters too. Many women feel ashamed of these cravings, so a non-judgemental conversation goes a long way in getting them to open up.

If cravings persist despite correcting nutrient levels, it's worth exploring other contributing factors, including psychological ones, with appropriate support.

ALSO READ- Can You Take Painkillers During Pregnancy? What's Safe and Why Trimester Matters

Conclusion

Craving ice, chalk, or paper during pregnancy can feel embarrassing to admit, but it's a genuinely common experience with a well-understood medical explanation behind it most of the time. Speaking up early means any underlying deficiency gets treated, rather than left to affect both mother and baby.