Ketones in the urine means that your body cannot process the glucose in your blood and instead is breaking down muscle tissue for energy instead. Ketones is a by-product of the process. It can be a sign of Diabetic Ketoacidosis, which is a medical emergency!
I am a laboratory scientist for 17 years, ketones in your urine indicates your should have a serum ketone level performed. This is a more accurate test of the presence of ketones. Urinalysis testing is a colormetric testand sometimes is influenced by interfering substances and is not as accurate as a serum ketone levels. If you are positive for ketones it is a medical emergency and you need to seek immediate attention. Ketone acidosis can be obvious to a doctor because many times they can smell a flowery almond type ordor on your breath. I hope this helps you
It's also possible for even non-diabetics to produce ketones if they are on an extremely low-carb diet. If glucose isn't present for the body to burn as fuel, your body will burn whatever else is available, including it's own fat and muscle tissue.