Why does a lack of water or drinking plenty of water negatively affect the body?

Water is an integral part of every person’s life. 70% of the human body is water. Since water is involved in almost all reactions in our body, lack of water negatively affects the functioning of the body. Lack of water directly affects the deterioration of mood, attentiveness and coordination, as a result, fatigue and headaches appear. However, if water has not entered the body for a long time, the concentration of a person’s blood rises without water, which leads to the fact that the cardiovascular system will be impaired, the heart rate is increased, and the blood pressure is increased. However, with excessive water intake, sodium levels in the body can reach a minimum, which in turn can cause cerebral edema and death.