The common causes of swelling in right calf are long time exercise or standing, lower extremity venous thrombosis, kidney disease, etc. 1. Prolonged exercise or standing: due to prolonged running, strenuous exercise or standing, the body is overworked, causing obstruction of venous return in the lower limbs, which can cause swelling of the calves, which is a physiological phenomenon and can be relieved after rest. 2. Lower extremity venous thrombosis: Lower extremity venous thrombosis can block blood vessels, causing lower extremity blood return obstruction, which can cause calf swelling. 3. Kidney diseases: such as chronic renal failure, due to the decline in the filtration capacity of the kidneys, decreased urine output, sodium retention, can cause swelling of the lower limbs and even the whole body. The causes of swelling of the right calf are more, may also be related to heart failure, hypoproteinemia, cirrhosis, diabetes complications and other diseases, if the symptoms continue to be unrelieved, it is recommended to consult a doctor in a timely manner, to clarify the cause of the disease, and to carry out targeted treatment.