Sodium deficiency can be manifested as symptoms of various systems of the body, including the cardiovascular system, the central nervous system, the digestive system, the urinary system and other symptoms, such as tachycardia, lethargy, nausea, vomiting and so on. 1. Cardiovascular system: mainly manifested as tachycardia, decreased blood pressure, fast and weak pulse, and even shock can occur. 2. Nervous center system: drowsiness in mild cases, convulsions, coma and other symptoms in severe cases, and in more serious cases, death may even be caused by this. 3. Digestive system: nausea, vomiting, loss of appetite, abdominal pain and so on. 4. Urinary system: manifested as low urine, short urine, or even incontinence, kidney function damage. If the lack of sodium appears to be unwell, you need to go to the regular medical institutions for consultation, and follow the doctor’s advice to actively treat.