Paresthesia can also be caused simply by putting pressure on a nerve by applying weight (or pressure) to the limb for extended periods of time. Another cause of paresthesia may be direct damage to the nerves themselves, i.e., neuropathy, which itself can stem from injury or infection such as frostbite or Lyme disease, or may be indicative of a current neurological disorder.
Checking for Ketones. Ketone is a chemical produced when there is a shortage of insulin in the blood and the body breaks down body fat for energy. Ketones in the urine is a sign that your body is using fat for energy instead of using glucose because not enough insulin is available to use glucose for energy. Ketones in the urine is more common in type 1 diabetes.
A American Diabetes Association answered. Ketones in the urine show that fat is being burned for fuel by your body. This typically occurs when you do not have enough insulin in your body to metabolize sugar as fuel or when you are fasting.