The causes of hand numbness, foot numbness, foot swelling and foot pain include diabetic peripheral neuropathy, sequelae of cerebral infarction, rheumatoid arthritis, and vegetative nerve dysfunction. 1. Diabetic peripheral neuropathy: this disease is mainly caused by poor glycemic control, peripheral nerve and microcirculation disorders, the onset of which can be accompanied by numbness of the hands, numbness of the feet, foot swelling, foot pain and other symptoms. 2. Sequelae of cerebral infarction: If the patient has a history of cerebral infarction, resulting in microcirculation disorders in the lateral limbs, the patient may have swelling of the feet. Due to the damage of sensory center, there will be numbness of hands and feet. Patients with high muscle tone cause foot pain. 3. Phytoneurological dysfunction: due to endocrine factors, environmental factors and other factors leading to phytoneurological dysfunction, patients may have symptoms such as numbness of hands, numbness of feet, swelling of feet, foot pain and so on. 4. Rheumatoid arthritis: this disease is a connective tissue disease, the onset of which can be numbness of the hands, numbness of the feet, foot swelling, foot pain and other symptoms. There are many other causes of hand numbness and foot numbness, swollen feet and pain, it is recommended to consult a doctor in time to clarify the cause of treatment.