Sitting for a day with swollen feet needs to be treated accordingly after the cause is clarified, including physiological causes and pathological causes, the latter such as lower extremity venous thrombosis, varicose veins of the lower extremities, etc., and its treatment includes general treatment, medication, physiotherapy, surgical treatment, and so on. 1. Physiological causes: when sitting, both lower limbs are in a sagging state, which is prone to poor blood reflux and stagnation in the interstitial space of tissues, which is generally temporary. After the sedentary state is changed, the edema will recover soon. Usually can reduce sedentary, sit for a period of time to get up and move for a while, or sit actively contract the muscles of the lower limbs, can effectively eliminate edema. 2. Lower extremity venous thrombosis: you can elevate the lower extremities, foot cushions, so that the lower extremities higher than the heart plane, wear elastic stockings or elastic bandage, reduce can reduce swelling. Anti-coagulant drugs, such as ordinary heparin, low molecular weight heparin, etc., and thrombolytic drugs, such as urokinase, can also be used. If necessary, surgery can also be performed. 3. Varicose veins of the lower limbs: usually, compression stockings and elastic bandages can be worn correctly, and venous active drugs such as warfarin can be used to treat the condition. Thrombolytic drugs such as urokinase and streptokinase can also be used, and acetaminophen and prostaglandin E can be chosen. Physical therapy such as electrocoagulation, laser, and radiofrequency are also effective. Surgery may be required if necessary. The above medications need to be used under a doctor’s supervision. When the symptom of swollen feet after sitting for a day occurs, if it still cannot be recovered after changing the sedentary state, it is recommended to consult a doctor in time for a clear diagnosis and appropriate treatment.