Post-exercise leg swelling may be caused by soft tissue injury, varicose veins of the lower extremities and other factors, but also cardiac and renal insufficiency or lymphatic circulation disorders. 1. Soft tissue injury: In the process of exercise, improper exertion leads to local soft tissue injury and abnormal blood circulation, which can also lead to leg swelling after exercise, accompanied by pain, local blood seepage and other uncomfortable symptoms. 2. Varicose veins of the lower limbs: If the blood is too thick, resulting in thrombosis of the lower limb veins, the blood flow is seriously impeded, resulting in abnormal blood supply to the legs, which in turn causes swelling of the legs after exercise. In addition, if you have cardiac and renal insufficiency or lymph node circulation disorders, leg swelling can also occur. It is recommended that you massage your legs to relieve the discomfort when you experience post-exercise swelling. If you experience serious discomfort in your legs, you can seek medical attention for a comprehensive examination and scientific treatment under the guidance of your doctor.