Final answer:
Gastric ulcer pain is influenced by the irritation of ulcerated tissue by acidic gastric juice, and is worsened by factors such as heavy alcohol consumption and smoking.
Step-by-step explanation:
The gastric ulcer pain that the patient experiences is likely due to the ulcerated tissue being exposed to acidic gastric juice. This acid can cause significant irritation and inflammation within the stomach lining. Contributing factors such as heavy alcohol consumption and smoking can exacerbate this condition by increasing stomach acid production and interfering with the stomach's ability to protect itself against the digestive juices.