Sore and swollen legs may be caused by strenuous exercise, varicose veins in the lower limbs or nerve compression, which can be treated by proper rest, surgical treatment, medication or physical therapy. 1. Strenuous exercise: If the human body after strenuous exercise, it may produce lactic acid, carbon dioxide and other metabolites in the leg muscles to accumulate, thus leading to the emergence of leg soreness and bloating, which can be relieved by proper rest. 2. Varicose veins of the lower limbs: If standing or sitting for a long time may lead to varicose veins of the lower limbs, due to poor local blood circulation, leg soreness may occur. It can be treated by wearing compression stockings or by radiofrequency ablation or cold light source transillumination rotational cutting. 3. Nerve compression: If the patient has lumbar spinal stenosis, it may lead to nerve compression, resulting in symptoms such as leg soreness and numbness. You can take oral ibuprofen, diclofenac sodium and other non-steroidal anti-inflammatory pain medications under the guidance of a doctor. When the patient develops leg soreness and swelling, he/she should consult a doctor for examination and treatment under the doctor’s guidance.