my son has constipation from last many months. tried everything possible. took him to the best doctor in the town also. medicine gives relive only when he is taking medicine. when I stop giving it to him. again he comes on the same state. He's 1.7 years. Feeding him cow milk. Giving him as less as I could to stop his constipation. Even after giving him less amount of milk He doesn't eats anything. accept milk. what should I do??