He seems to be suffering from chronic constipation. Constipation needs treatment over months, not weeks. Increasing fluid intake & fibre content in the form of fruits and vegetables works in the long run. Passing blood in the stool is secondary to anal fissure as a result of constipation. For now he needs stool softeners to alleviate his symptoms. Try giving him Mu-out Powder 2 scoops mix with 120 ml water before bed for a week and consult me online with the response.