Numbness of the hands and feet after diarrhea may be caused by keeping a position for a long time, dehydration or gastroenteritis. 1. Keep a position for a long time: diarrhea will keep your hands and feet in a position for a long time when you go to the toilet, and keeping your hands and feet in a position for a long time will lead to poor blood flow in the periphery of your hands and feet, which will show the symptom of numbness in your hands and feet after diarrhea. 2. Dehydration: diarrhea will cause the body to discharge a large amount of water, showing symptoms of dehydration. Dehydration in the blood vessels in the case of water will seep out into the tissue cells, resulting in a reduction of blood in the blood vessels in the hands and feet, showing numbness in the hands and feet after diarrhea. 3. Gastroenteritis: diarrhea caused by gastroenteritis can lead to electrolyte disorders in the patient’s body, electrolyte disorders are mostly caused by the lack of sodium chloride, potassium chloride, etc. Electrolyte disorders can lead to weakness in the limbs, accompanied by numbness in the hands and feet. After diarrhea numbness in the hands and feet if not relieved, it is recommended to go to the hospital to check the cause, targeted treatment.