Final answer:
The 50-year-old man is likely experiencing acute pancreatitis, which requires hospitalization and treatment to manage symptoms and address underlying causes.
Step-by-step explanation:
The symptoms described by the 50-year-old man with a history of alcohol abuse are consistent with acute pancreatitis. In this condition, there is inflammation of the pancreas leading to severe abdominal pain that often radiates to the back. The pain is typically relieved by sitting forward. Treatment for acute pancreatitis involves hospitalization, intravenous fluids, pain medications, and management of any underlying causes such as alcohol withdrawal. In severe cases, surgery may be necessary.