Thanks for asking at HCM. I have read your question and I understand your concern. well right sided lower abdominal pain could be because of number of causes like right sided ureteric stones, crohn s disease, constipation, indigestion, gas, lactose intolerance, ulcers, urinary tract infections,hernia, appendicitis and even worm infestations. H pylori will result in epigastric pain rather than right lower abdominal pain. investigations like urine routine examination and X ray erect abdomen, ultrasound of abdomen and pelvis with a full blood count will help in diagnosis. Mean while he can take plenty of water for a suspected urinary tract infection, and raw milk and milk products will help in lactose intolerance. I hope it can be of some help. thanks Dr Taimoor