People who are overweight may have folds in their skin, which are breeding grounds for bacteria. This is common with diabetics -- whose problems with smell can go beyond having a few extra pounds. "If they have higher-than-normal blood sugar, there's a condition called diabetic ketoacidosis -- or DKA," says Dr. George. "And those patients tend to have more of a fruity smell to them."
Wait a minute. A fruity smell?
"If you're not controlling the diabetes well, your body can't utilize sugar as much. You're going to break down fats," explains the doctor in describing DKA. "And that can produce distinctive odors."
There's also a condition called (yes, this is a real one) maple syrup urine disease that's generally found in kids. "Kids can often have underlying liver disorders where they are missing enzymes to help them metabolize certain food products," Dr. George says. "So their urine smells like maple syrup -- believe it or not."