Hi Dear, Welcome to HCM. Understanding your concern. As per your query you are having sore lower back and abdominal cramps in an alcohol addict . Well there can be many reasons for symptoms you mention in query like gastroenteritis , food poisoning , irritable bowel syndrome , lactose intolerance , giardiasis or intestinal Ileus. But in your case the symptoms are probably due to swelling of liver . For now eat light and non spicy , avoid food like sea food and nuts , take antacid after every meal and keep your head elevated while lying down . I would suggest you to consult gastroenterologist for proper examination . Doctor may order stool test , ultrasound , endoscopy along with that take history . Doctor may prescribe laxative , ornidazole or albendazole , anaspas along with ranitidine . Avoid laying on bed after immediately having food. For now drink lot of water, do light exercises and avoid fatty , do not drink alcohol and heavy meals. Hope your concern has been resolved. Get Well Soon. Best Wishes, Dr. Harry Maheshwari