What are the disadvantages of drinking too much water?

Drinking excessive amounts of water can lead to water intoxication, a rare but serious condition. Water intoxication, also known as hyponatremia, occurs when there is too much water in the body, diluting the concentration of sodium ions in the blood and affecting cellular function. Symptoms may include headache, nausea, vomiting, fatigue, muscle cramps, and in severe cases, confusion, coma, and potentially life-threatening complications. Generally, drinking an appropriate amount of water is healthy, but overconsumption should be avoided, especially for individuals with kidney insufficiency or those taking certain medications. Patients should follow the principle of "drink when thirsty" and adjust their water intake according to individual activity levels and health status. If in doubt, they should consult a physician.