7. Pica

Pica is an eating disorder in which individuals crave and consume non-food items, such as dirt, chalk, hair, or paper. It often occurs in children or those with developmental disorders, though adults can be affected as well.
The condition may be linked to a deficiency in iron or other minerals, but its exact cause remains a mystery. Pica poses significant health risks, including poisoning or gastrointestinal issues, making early intervention crucial.