Why do my eyes swell when I drink water while sleeping?

If you drink too much water when you sleep, you may have swollen eyes the next day. In medicine, this is called water intoxication, which rarely happens clinically. Some women hope to lose weight by drinking water. If they drink too much water, this may cause this situation. Water intoxication has a greater impact on kidney function, and can also cause headaches, nausea and vomiting, blurred vision, etc.

Basic symptoms of water intoxication

1. Headache and drowsiness. Simply put, after water poisoning occurs, people will feel very tired and want to sleep. The reason for drowsiness is excessive water in the body, which leads to a decrease in plasma osmotic pressure and an increase in intracranial pressure. Under these multiple influences, people will feel very bad, have a headache and want to fall asleep very much.

2. Loss of appetite, nausea and vomiting. If the human body suddenly ingests a large amount of water, the concentration of digestive juices will be severely diluted, and the absorption of water remaining in the digestive tract will also decrease because the water content in the body fluids has exceeded the normal level.

3. Muscle spasms and pain. When a large amount of water enters the digestive tract and is then absorbed by the stomach and intestines and enters the cells, it will destroy the original fluid balance of the cells and cause the human cells to swell, including muscle cells throughout the body, leading to muscle spasms and pain.

4. Blurred vision. A large amount of water enters the head, causing an increase in water in the tissues and organs around the eyeball, and an increase in body fluids in the tissues and intracranial pressure, which gradually compresses the eyeball and surrounding tissues, causing blurred vision and fatigue.

Causes

1. Excessive secretion of antidiuretic hormone (ADH)

Excessive secretion of antidiuretic hormone due to various reasons can be seen in fear, blood loss, shock, acute infection (such as pneumonia, toxic dysentery, etc.), use of analgesics (such as morphine, pethidine), or stress stimuli such as pain and surgery. Increased ADH secretion after surgery usually lasts for 12 to 36 hours, or longer. In this case, excessive intake of electrolyte-free solutions such as glucose can easily lead to water poisoning. In addition, patients with late-stage hypothyroidism who develop partial fluid edema can also increase ADH secretion through stimulation of pressure receptors, and abnormal ADH release may also occur in cases of adrenal cortex insufficiency.

2. Renal dysfunction

During the oliguria and anuria stage of acute renal failure, the dilution and concentration functions of the kidneys are impaired. Excessive water intake at this time can easily lead to water intoxication. In addition, if renal blood flow is insufficient or glomerular blood perfusion is severely reduced for any reason, excess water cannot be excreted and water intoxication is likely to occur in combination with hypotonicity.

3. Excessive water entry

Excessive water intake, such as primary polydipsia in chronic mental patients. Certain iatrogenic factors such as excessive intravenous fluid infusion, the use of oxytocin or vasopressin. At this time, the volume of extracellular fluid increases significantly, the serum sodium concentration decreases, and the osmotic pressure also decreases, causing excessive water to enter the cells.