If the symptoms of tingling in the hands and feet occur during sleep, it is necessary to see if there is any electrolyte disorder, which can generally be seen as a result of low potassium, and the electrolyte level can be checked. In case of low potassium, you can pay attention to eat more potassium-rich foods in your diet, such as bananas and oranges. Numbness in the hands and feet during sleep is also a neurological problem, which is usually caused by peripheral neuritis, such as diabetes mellitus. This condition needs to be checked for blood sugar, glycated hemoglobin and other tests to clarify. If the condition is caused by diabetes, you need to choose glucose-lowering drugs or insulin to strictly control the stability of blood sugar, and at the same time can be combined with blood circulation and nerve nourishing drugs to treat.