Edema after exercise may be caused by soft tissue injury, muscle strain, glomerulonephritis and so on. 1. Soft tissue injury: soft tissue injury is caused by strenuous exercise or strain, etc. If the exercise is not correct or long-term weight-bearing, it is easy to induce soft tissue injury. At this time, the patient will have localized blood seepage, edema, pain and other manifestations, some patients may have serious muscle or tendon adhesions, joint stiffness, periarthritis and so on. 2. Muscle strain: Muscle strain may be caused by sudden direct traction on the muscle, and common triggering factors include not warming up during exercise or repeating the same exercise for a long time. Patients will experience swelling of the affected area, muscle soreness, muscle stiffness or weakness, and restriction of the movement function of the strained area, etc. Therefore, some patients will have the symptom of post-exercise edema. 3. Glomerulonephritis: Glomerulonephritis may be caused by heredity, infection, immune system disease, malignant tumor and other factors. Patients will have edema in the lower limbs, face, eyelids and other parts of the body, and some patients will have generalized edema. If the patient himself has glomerulonephritis, the condition may be aggravated after exercise, so the patient will have edema. It is recommended that patients who have edema after exercise need to consult a doctor in time, and the doctor will choose targeted measures according to the patient’s condition.