The exact etiology of<unk>  is unknown. Repetitive minor trauma is proposed to be a likely cause, with risk factors such as strenuous coughing, exercise, and lifting identified. Infection of the costosternal joint may cause<unk>  in rare cases. Most cases of infectious<unk>  are caused by Actinomyces, Staphylococcus aureus, Candida albicans, and Salmonella. In rare cases, Escherichia coli can be a cause of infectious<unk> .
Costochondritis
Pneumothorax
Osteochondritis
Pulmonary embolism
Athletic pubalgia
Fibromyalgia
Epicondylitis
Angina