Swelling of the calves after sitting for a long time is considered to be a result of compression of the calf blood vessels due to the squeezing of the muscles and fat during sedentary sitting, which leads to slowed blood circulation and poor blood flow, resulting in numbness of the calves in mild cases and swelling of the calves in severe cases, and can cause difficulty in movement. If a patient occasionally experiences swelling of the calf when sitting for a long time, consider that the blood circulation is impaired due to the body position. If the patient experiences swollen calves for a long time while sitting, consider whether the patient’s heart muscle function function and body position, as well as other organs, such as kidney and liver function, are normal. Therefore, when the calves swell in a sedentary position, the patient should promptly change the position and straighten both legs to ensure smooth blood flow and normal blood circulation, which can usually be relieved in three minutes. If the swelling of the calf cannot be eliminated, the patient needs to have a timely examination of the heart and other organs to clarify the cause and carry out symptomatic treatment.