Numbness of the back of the foot for several days may be a physiological phenomenon, may also be the manifestation of certain diseases, such as lumbar disc herniation, diabetic foot, etc., should be timely consultation to identify the cause.
1. Physiological factors: If the shoes worn recently are not suitable for the feet, or the shoelaces are tied tightly, it may cause poor local blood circulation, thus numbness of the instep appears.
2. Lumbar intervertebral disc herniation: mainly caused by lumbar chronic strain, age-related changes, congenital developmental abnormalities, genetic factors, lumbar injuries, pregnancy, obesity, etc. Most of the patients manifested lumbago and sciatica, accompanied by radiating pain, numbness and weakness of the lower limbs, which affects the patients’ walking and lumbar activities.
3. Diabetic peripheral neuropathy: often caused by diabetic patients due to peripheral neuropathy and vascular lesions, such as mixed diabetic foot patients’ feet can appear foot sensation numbness, also can be accompanied by lower extremity cold, intermittent claudication, foot arteries weakened or disappeared, the foot skin temperature drop and other symptoms.
Numbness of the dorsum of the foot may also be caused by other factors, such as damage to nerve endings. It is recommended to consult a doctor in time to clarify the cause and give targeted treatment.