Thank you for the question. At this age usually children do not eat enough fibers and intake of fluids is also less. These two factors are most important for soft and normal bowel movements. Along with medication he needs freshly made soups, salads, fruits and vegetables in all meals along with water and juices. Give a glass of water as soon as he wakes up followed by a glass of milk after half an hour. Apply liquid paraffin at anal opening so that fecal passage is smooth. You can try warm milk with honey and two tsf ghee(clarified butter) before bed time. This has to be incorporated in life of the family, which usually kids follow.