The numbness of the hands and feet after vomiting may be caused by insufficient cerebral blood supply, electrolyte disorders, metabolic alkalosis and other reasons. 1. Insufficient blood supply to the brain: excessive vomiting will cause insufficient blood supply to the brain to trigger a decrease in the blood volume of brain tissue, and then brain tissue ischemia caused by neurological deficits, numbness in the hands and feet symptoms. 2. Electrolyte disorders: Vomiting can cause the body to lack a large number of body fluids and electrolytes resulting in electrolyte disorders, triggering hyponatremia, hypokalemia and other problems. The body’s sodium, potassium and other elements of the content is too small will trigger muscle weakness, so after vomiting hands and feet tingling. 3. Metabolic alkalosis: a large amount of gastric fluid loss caused by metabolic alkalosis, triggering a rapid increase in neuromuscular excitability, dizziness, numbness of the hands and feet and other symptoms. When the symptoms of tingling hands and feet after vomiting, the patient should promptly consult a doctor for examination, after the doctor diagnosed to take appropriate treatment.