Final answer:
Peritonitis is inflammation of the peritoneum, often caused by a peptic ulcer perforation. It can lead to RLQ pain and is treated with emergency surgery and antibiotics.
Step-by-step explanation:
Peritonitis is a condition characterized by inflammation of the peritoneum, which is the lining of the abdomen. Chemical peritonitis can occur when the wall of the digestive tract is breached, allowing the contents to enter the peritoneal cavity. When a peptic ulcer perforates the stomach wall, gastric juices can spill into the peritoneal cavity, resulting in RLQ (right lower quadrant) pain and peritonitis. This condition can be life-threatening and often requires emergency surgery and antibiotic therapy.