The serious consequences of drinking less water include water shortage, electrolyte balance disorders, and functional deterioration of various organs and systems. 1. Lack of water, electrolyte balance disorders: due to drinking less water, the body is in a state of water shortage for a long time, and the metabolic balance of electrolytes is significantly affected, such as high sodium, high potassium, etc., which affects the health of the body. 2. Decreased function of organs and systems: Due to drinking less water, metabolic wastes and excess heat cannot be discharged from the body through sweat glands and kidneys, resulting in the accumulation of toxins in the body, and all organs are in a state of dehydration, inducing a variety of diseases, especially kidney disease and digestive discomforts, which pose a threat to health. It is recommended to ensure a certain amount of water intake every day to promote the body’s metabolism, to help ensure good health.