Post bariatric surgery induced myocarditis in setting of autoimmune disease is rarely encountered in clinical practice. However, till date only few data of bariatric surgery induced myocarditis in setting of connective tissue disease (CTD) have been available. The following report illustrates the case of a 39-year-old female suffering from myositis who exhibited a nutritional deficiency myocarditis following biliopancreatic diversion surgery (BPD). The mechanism of myocarditis in patients suffering from CTD is incompletely understood. In this case we are going to try to found a relation between bariatric surgery, myocarditis and connective tissue disease and urges cautious action before surgery performance in the setting of suspected nutritional deficiencies and in connective tissue disease (CTD) as injudicious act might increase the risk of deleterious myocarditis and increase the mortality.