Patients with numbness in the right toe need to be alert to the following four diseases: 1, lumbar disc herniation or sciatica type of disease. This type of disease is the lumbar or sacrococcygeal nerve trunk is compressed and stimulated, followed by a series of symptoms such as pain, numbness and weakness in the lower limbs. If there is a trauma or other occupying factor in the ankle canal, resulting in peripheral nerve compression, there may be numbness in the toe. 3. Be alert to vascular lesions in the lower limbs, such as deep vein thrombosis or thrombo-occlusive vasculitis. The former is a lesion that occurs in the deep veins, and the latter is a lesion that occurs in the arteries. Both can lead to poor blood circulation in the lower extremities, followed by coldness, purple and numbness in the toes. 4, need to be alert to complications of diabetes, there are many patients with diabetes in the late stages due to long-term hyperglycemia, which may cause damage to the peripheral nerves, followed by numbness around the toes.