Pica is an eating disorder in which a person repeatedly craves and eats things that are not food, such as chalk, soil, paper, hair or even sharp objects like needles. It can affect children, pregnant women and adults, and it may be linked to nutritional deficiencies such as iron or zinc, mental health conditions, developmental or intellectual disabilities, or stress. Swallowing non-food items can be dangerous. Sharp or hard objects can pierce or block the intestine, cause infection and may need emergency surgery. Warning signs include severe stomach pain, repeated vomiting, constipation, bloating or blood in the stool. Pica is a medical condition and not a bad habit, and shaming the person does not help. Doctors may check for deficiencies, do scans and recommend treatment and counselling. If you or someone you know keeps eating non-food items, or has swallowed a sharp object, seek medical help immediately.