The right calf shows numbness and swelling, seen in the following reasons: First, patients with lumbar disc herniation, if the local nerve compression, will show numbness and pain in the lower limbs, but also pain in the lower back, and even limited activity, and the cause of this disease and long chronic strain related, especially prolonged weight bearing, upright position physical activity or often sitting, lack of activity. In elderly patients, the bone degenerates, the elasticity of the fibrous ring decreases, and the nucleus pulposus can prolapse and compress the nerve roots, resulting in a series of clinical discomfort. Secondly, some patients are caused by venous thrombosis of the lower extremities and have restricted blood flow in the distal veins, the patient will have obvious swelling and pain in the lower extremities, and in severe cases, local numbness and bruising of the femur will also occur.