The swelling of sitting feet at work is mainly caused by venous insufficiency of the lower limbs, because when sitting and standing for a long time, the legs are in a sagging state, the venous elasticity is weakened, and the venous valve insufficiency leads to blood reflux, and the blood reflux will accumulate in the lower limbs for a long time, especially in the ankles and feet will have obvious swelling. If the condition allows, you can promote the venous reflux by standing up, walking or tiptoeing in the middle, and at the same time you can take oral anti-swelling drugs, such as horse chestnut seed extract, Mai Zhi Ling tablets, calcium hydroxybenzene sulfonate, etc. to promote the venous reflux and reduce the local edema. You can also wear varicose vein socks for lower limbs, through the role of varicose vein socks to passively make the blood flow back, the local swelling will be significantly improved, so when there is a swelling of the feet sitting at work, you need to choose the appropriate method to improve with your own situation.