Bulging tendons on the feet may be the result of increased blood flow due to poor vascular reflux in the lower extremities. Poor vascular reflux in the lower limbs is caused by varicose veins, venous plaques and other diseases. 1. Varicose veins: varicose veins of the lower limbs usually occur in special groups of people such as long-term standing, pregnant women, etc. Due to the long-term increase in venous pressure in the lower limbs, the elasticity of the venous walls of the lower limbs decreases or is accompanied by venous valves’ insufficiency, which leads to venous regurgitation, causing blood stagnation in the ankles. 2. Venous plaque: sedentary people or postoperative bedridden patients are prone to local blood stagnation forming venous plaque, further aggravating the venous return obstruction, resulting in increased blood flow in the ankle and bulging tendons on the feet. There may be other reasons for the bulging tendons on the feet, and it is recommended that further examination be carried out to clarify the cause of the problem and to treat the cause of the problem.