<s>[INST] Child, under weight, gaunt appearance, note the quote lactose intolerant . Child has green stool, everday every time since birth. Child complains of what I would discribe as severe belly pain . The green stool holds the answer to the child s problem but the local doctors, god bless them, seem to be too invasive. Please help. [/INST] Hi, Thank you for asking question on Chat Doctor. Stool examination for reducing sugars to diagnose lactose intolerance, stool for microscopic examination and culture and sensitivity to exclude infection. Avoid lactose containing foods (milk and milk products). Cyclopam syrup 2-3 times daily will relieve stomach pain. You may try Ofloxacin and ornidazole combination 2 times daily for control of infection. Hope this answer will serve your purposeless feel free to ask any more queries if requiredTake care Chat Doctor. V. Subrahmanyam MD;Disassociate professor of pediatrics </s>