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Lack of physical activity and any exercises plus prolonged sitting can cause swelling due to pressure of sitting crossed, calf tightness and joint stiffness. Becoming active, stretching exercises and joint movement is required.

Dear sir Swelling in the legs especially in feet develops due to prolonged sitting I advice you to walk regularly at home, keep your legs elevated by keeping a pillow under ankle while sleeping If you are hypertensive pls check your BP once and keep it under control If the swelling keep extending upwards with pain consult a day doctor