Diabetes was one of the first diseases described,[107] with an Egyptian manuscript from c. 1500 BCE mentioning "too great emptying of the urine".[108] The Ebers papyrus includes a recommendation for a drink to be taken in such cases.[109] The first described cases are believed to be of type 1 diabetes.[108] Indian physicians around the same time identified the disease and classified it as madhumeha or "honey urine", noting the urine would attract ants.[108][109]
Type 2 DM begins with insulin resistance, a condition in which cells fail to respond to insulin properly.[2] As the disease progresses, a lack of insulin may also develop.[12] This form was previously referred to as "non insulin-dependent diabetes mellitus" (NIDDM) or "adult-onset diabetes".[2] The most common cause is a combination of excessive body weight and insufficient exercise.[2]

Low blood sugar (hypoglycemia) is common in people with type 1 and type 2 DM. Most cases are mild and are not considered medical emergencies. Effects can range from feelings of unease, sweating, trembling, and increased appetite in mild cases to more serious effects such as confusion, changes in behavior such as aggressiveness, seizures, unconsciousness, and (rarely) permanent brain damage or death in severe cases.[24][25] Moderately low blood sugar may easily be mistaken for drunkenness;[26] rapid breathing and sweating, cold, pale skin are characteristic of low blood sugar but not definitive.[27] Mild to moderate cases are self-treated by eating or drinking something high in sugar. Severe cases can lead to unconsciousness and must be treated with intravenous glucose or injections with glucagon.[28]
Today, 425 million adults live with diabetes, and that number is expected to grow to 629 million by 2045, with the greatest number between the ages of 40 to 59 years old. The global prevalence of diabetes has risen from 4.7 percent in 1980 to 8.5 percent in 2014, with the proportion of type 2 diabetes increasing around the world. On top of those numbers, another whopping 352 million people are at risk of developing type 2 diabetes. According to the 2017 Economic Cost of Diabetes survey sponsored by the American Diabetes Association, the total cost of diabetes was estimated to be $327 billion, a 26 percent increase since 2012. About three-quarters of those costs are associated with direct medical expenditures. Patients with diabetes are expected to pay an average of $9,600 in additional medical costs annually. A diabetes cure could cut out a nice chunk of fat out of those costs, potentially worth $245 billion from the 30 million diabetic Americans alone.
Diabetes is a number of diseases that involve problems with the hormone insulin. Normally, the pancreas (an organ behind the stomach) releases insulin to help your body store and use the sugar and fat from the food you eat. Diabetes can occur when the pancreas produces very little or no insulin, or when the body does not respond appropriately to insulin. As yet, there is no cure. People with diabetes need to manage their disease to stay healthy.