Pica is an abnormal appetite for earth and other non-foods. Pica is common in small children, and occasionally in pregnant women. In extreme forms it is regarded as a medical disorder.
Examples of pica are:
- geophagy (consumption of soil)
- mucophagy (consumption of mucus)
- trichophagia (consumption of hair or wool)
- scatophagy (consumption of excerement or other filth)
- please add more examples to this list
Warning: pica in children, whilst common, can be dangerous: children eating painted plaster may suffer brain damage from lead poisoning from lead in the paint.