The symptoms of leg swelling and pain can be caused by the following reasons: 1. it may be caused by lumbar disc herniation; 2. it may be caused by varicose veins in the lower extremities. 3. recent excessive exercise and lactic acid accumulation in the legs; 4. lack of certain nutrients in the body and the symptoms of leg swelling and pain; 5. it may be caused by sciatic nerve lesions, such as pear-shaped muscle syndrome. Sciatica needs to be taken seriously enough. If the symptoms are not relieved within a short period of time after bed rest and elevation of the affected limbs, you must go to a regular hospital in time to improve the electromyography of both lower limbs and the vascular ultrasound of the lower limbs to clarify the severity of the disease, so that you can choose a reasonable treatment method to get timely and effective relief of the symptoms of leg distension and pain.