Thank you for your query on HealthCareMagic.
Your son is passing small quantities of hard stool freuently as he is constipated and unable to evacuate at one go. Constipation
is basically a nutritional issue as the diet is deficient in fibres. It is suggested that you increase fruits and vegetables in his diet. Try to avoid refined flour. In case this does not help then resort will need to be taken to medication.
Hope I have answered the query to your satisfaction.