This problem of eating sand and other odd things is called pica. It is usually due to an iron deficiency in his diet and he is probably anaemic as a result. Please take him to be tested by your paediatrician or doctor as soon as possible.
The information provided does not constitute a diagnosis of your condition. You should consult a medical practitioner or other appropriate health care professional for a physical exmanication, diagnosis and formal
advice. Health24 and the expert accept no responsibility or liability for any damage or personal harm you may suffer resulting from making use of this content.