Calf swelling and pain is considered to be related to physiological factors, varicose veins, lumbar intervertebral disc herniation, etc. The treatment methods include general treatment, drug treatment, surgery and so on. 1. Physiological factors: standing for a long time, sudden strenuous exercise or improper exercise posture can lead to calf distension, calf distension can be properly massaged, massage, promote blood circulation, and pay attention to rest, and in the future to avoid a certain posture for a long time, and to make adequate preparations before exercise. 2. Varicose veins: When varicose veins exist in the calf, they can cause swelling, numbness and cold pain in the calf. Varicose veins can be treated conservatively with compression stocking wrapping, etc. Surgery can be chosen if the varicose veins are severe and the pain symptoms occur frequently. 3. Herniated disc in lumbar spine: When the disc is herniated, it can compress the nerve and cause swelling and pain in the calf, then you can take non-steroidal anti-inflammatory drugs (e.g. diclofenac sodium), neurotrophic drugs (e.g. methylcobalamin) and other treatments. Surgery may be considered if conservative treatment is not effective. Calf swelling and pain may also be related to other causes, it is recommended to consult a doctor in a timely manner to identify the cause of the disease, and standardized treatment under the guidance of the doctor. The above drugs should be used under the guidance of a doctor.