Hello dear, Though eating of slate pencils may not cause you any acute health issue per se, except may be episodic pain in abdomen(as mentioned in your post), it can be a feature of an underlying pathological condition. The continuous craving for eating inedible substances (like slate pencils) is known as Pica. It is one of the features of Iron deficiency anemia. Investigations like complete blood count & peripheral blood smear will be helpful in clinching the diagnosis. Based on the reports, management will include administration of supplemental Iron & Folic acid preparations. There can be associated factors like hookworm infection which needs to be managed with Albendazole preparations. Also you need to take a healthy balanced diet rich in green leafy vegetables. So, kindly consult your General Physician for proper clinical evaluation. Wishing you a good health. Take care.