Although primary pericarditis is unusually experienced and diagnosed in paediatric population, it has probable life threatening sequel. This case report presents a case of complicated community acquired staphylococcal pericarditis, which illustrates how evasive the diagnosis of pericardial effusion can be. Early identification of pericarditis and pericardial effusion is vital to enable emergent intervention to enhance prognosis and alleviate mortality. The purpose of this report is to probe into the etiology of acute pericarditis and also to review the clinical presentation, the management and complications connected with acute pericarditis.