Sugar disease is a serious disease that can affect a person's health and quality of life. This disease is characterized by a violation of carbohydrate metabolism, resulting in excess glucose in the body. Symptoms: fatigue, sweating, weakness, thirst, polyuria. Impaired pancreatic function, increased insulin secretion, decreased glucose-releasing action of insulin. The disease is characterized by changes in the quality of the skin, ulcers on the lower extremities, problems with the eyes - pallor, swelling, difficulties with color perception, pain. Diabetes mellitus is not an independent disease, but a general name for a group of disorders. **Diabetes mellitus** is a chronic metabolic disorder in which the body loses the ability to fully utilize the food it receives for energy production or for the synthesis of necessary substances.