Sigmoid diverticulitis occurs when pouches form in the sigmoid colon wall and become inflamed. Symptoms include abdominal pain, fever, nausea, and bleeding. Diagnostic tests include CT scans, barium enemas, and colonoscopies. Treatment involves antibiotics, fluids, pain medication, and sometimes surgery to remove the inflamed portion of the colon. For patients undergoing laparoscopic sigmoid colon resection, the procedure removes the diseased part of the colon and reattaches the healthy parts. Post-operative care focuses on pain management, monitoring the surgical site, and early ambulation.