What Causes Bad Body Odor, and How Do I Get Rid of It?

Diabetes. 
Diabetes patients often experience additional medical complications, including a sudden change in smell or body odor. Urinary tract infections and the high level of blood glucose can increase body odor and bad breath. Going even further, diabetic ketoacidosis is a life-threatening condition when your body doesn’t have enough insulin and your cells cannot get the sugar they need for energy. One of the symptoms is a distinct, fruity breath smell. (Contact your physician immediately if this occurs.)