The early stages of hypotonic dehydration can present with physical weakness, dizziness, and numbness in the hands and feet. There are more causes of hypotonic dehydration in the body. In patients after surgical procedures, it is common to lose extracellular fluid and just replenish the body with water and salt, resulting in a relative lack of sodium and water in the body. In patients with gastrointestinal and digestive disorders who have vomiting, intestinal obstruction, diarrhea, and gastrointestinal fistula, the body loses a lot of sodium with digestive juices, which can vary depending on the degree of sodium deficiency in the patient. Mild sodium deficiency will lead to physical fatigue, dizziness, numbness of hands and feet, less pronounced thirst, and if examined in the hospital will find less sodium in the urine, some patients are prone to blurred vision, weakness, and as symptoms worsen will appear nausea, vomiting, unstable blood pressure, and reduced urine output.