Hyperosmolar nonketotic state (HNS) is a dangerous form of diabetic coma. This state is also known by some other terms like hyperosmolar hyperglycemic nonketotic coma (HHNKC) or hyperosmotic non-ketoic acidosis (HONK). This complication may arise in persons having any type of the diabetes, Type 1 diabetes as well as Type 2 diabetes. In HNS, the level of blood sugar continues to rise, and the body tries to get rid of the excess sugar in the blood by passing more urine. The feeling of thirst continues despite intake of more than usual water or other liquids. If sufficient water or liquids are not consumed, the body becomes dehydrated. The HNS develops over a period of time lasting several days, weeks, and even months.