Symptoms of sodium deficiency are determined by the specific degree of sodium deficiency. The normal value of blood sodium is 135 micromol/L. Severe sodium deficiency in the short term may lead to death. Long-term sodium deficiency may cause limb weakness, intracranial edema, cardiac arrhythmia, epilepsy, etc. Currently, there are three main types of clinical deficiency: mild sodium deficiency, moderate sodium deficiency and severe sodium deficiency. 1. Blood sodium 130～135 micromol/L is mild sodium deficiency, and the main symptoms are dizziness, fatigue, increased urine output, low urine specific gravity, numbness of hands and feet. 2. Blood sodium 120～130 micromol/L is moderate sodium deficiency, in addition to dizziness, fatigue, numbness of hands and feet, there will be nausea, vomiting, skin elasticity decreased, eyeballs sunken, rapid pulse, blood pressure drop and other symptoms. 3. Blood sodium <120 micromol/L for severe sodium deficiency, low-sodium manifestations of aggravation, indifference, stiffness and other neurological symptoms, shock can occur in severe cases. If the above symptoms appear, you should consult a doctor in time.