Left calf cramps may be due to lumbar disc herniation, poor blood circulation in the lower limbs, calcium deficiency and other reasons, should be localized massage, microwave therapy and other physical therapy, and drug therapy. 1. Lumbar disc herniation: at this time, we should pay attention to sufficient rest, massage, microwave therapy, air pressure therapy and other physical therapy, but also pay attention to keep warm. 2. Poor blood circulation in the lower limbs: poor blood circulation in the lower limbs should be taken to improve microcirculation of drugs, such as aspirin, etc., the above drugs have gastrointestinal bleeding, resulting in liver and kidney function abnormalities and other adverse reactions, all need to be under the guidance of a doctor to use medication, and avoid self-medication. 3. Calcium deficiency: If calcium deficiency occurs, you can also take calcium tablets, eat more calcium-containing foods, such as lean meat, milk and other methods to solve the problem. If the above symptoms do not improve after treatment, you should go to the hospital in a timely manner to clarify the cause of the disease and have regular treatment as soon as possible.