The causes of numbness in the patient’s right heel are as follows: First, lumbar disc herniation: when the herniated disc compresses the sacral 1 nerve root, numbness in the right heel and lateral aspect of the outer ankle foot often occurs. Second, ankle canal syndrome: when the cervical nerve is compressed in the ankle canal, it will cause abnormal skin sensation or numbness in the area of cervical nerve innervation, which can generally manifest as numbness and abnormal sensation in the heel and sole of the foot. Third, diabetes: patients with advanced diabetes often have peripheral neuropathy, the most common is numbness in the fingers and hands, and numbness in the heel and foot, like the feeling of wearing gloves and socks.