Introduction: In order to pinpoint the causes of the bad outcome and precisely treat them in the context of lowering poor outcomes among patients with secondary peritonitis, the current study set out to investigate the diverse spectrum of aetiologies that cause secondary peritonitis. Materials and Methods: This study included 86 patients who had generalised peritonitis upon presentation. All patients who arrived at the hospital with a confirmatory diagnosis of peritonitis and received treatment during the trial period were enrolled using an easy enrolment approach. Analysis is conducted to ascertain the prevalence of peritonitis by age and sex, risk factors, and the effectiveness of early treatment. Results: The age group most impacted was 21–40 years old (38.0%). For both sexes, children under five years old were the least impacted age group (1.5%). Male patients made up 65.2% of the affected population. Chi Square = 63.867 and a p-value of 0.003<0.05 indicate a significant correlation between the cause of intestinal rupture and age. Bowel perforations were most frequently caused by typhoid fever (18.18%), followed by trauma (13.64%), whereas inflammatory bowel disease and idiopathic causes (3.03%) were least common. Conclusion: In conclusion, ischaemia, typhoid, peptic ulcer disease, and perforated appendicitis are the most frequent causes of secondary peritonitis. Furthermore, it is advised to do research to examine the long-term consequences of secondary peritonitis patients.