Hello Doctor.. my Name is Kevin.my dad often gets sharp pain in his right abdomen upper side always at night.. he seems to be fine during the day but he often complains about this pain in his right side of his abdomen.. he doesn't sleep well.. doesn't eat well.. whenever he gets this pain he gets restless and vomits whatever he eats. He's an alcoholic too. Could you suggest what needs to be done to treat his illness.. Thank you